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It felt so amazing: Elsa's member pressing gently against the soft swell of backside, the burning hot body beneath hers, and the taste of the blood dripping into her mouth. Elsa's face flushed as she drank greedily, taking hungry and desperate gulps of the girl's life-force. Arousal coursed through her at she savored the flavor, power and energy surging through her already strong body.

It tasted so good. Thick, and wet in her mouth- salty yet sweet like the broth of a delicious soup. Elsa gasped, unable to stop herself from drinking even more. Instinct told her she was taking too much, that if she continued this source of blood would fizzle out and she would have to find new prey, but she couldn't control this hunger. Couldn't stop her grip from tightening on the girl, nor her fangs from burying themselves into freckled flesh even deeper. Elsa ground herself up against the girl beneath her, desperate for skin to skin contact. Her cock was impossibly swollen, and she hissed with pleasure.

She stopped drinking, wondering if the other girl was feeling good too. Elsa leaned over her, taking in her reaction to Elsa's touch. Elsa could feel the girl's hardened nipples beneath her fingers, and when she inhaled deeply the thick scent of her prey's arousal hit her like a train. Even unconscious, this girl's body knew what it wanted.

Elsa's thirst for blood dwindled as she took in these incredibly sexy reactions. No, she didn't want more blood: her body wanted something else now. It wanted to hear these girl's sweet moans, taste more of her arousal, and smell it too. This girl was wet and waiting and open for her. Elsa just knew it.

She easily flipped the girl onto her back. It was an effortless process, as if the girl weighed nothing.

Something began to itch at the back of Elsa's brain as she stared down at the naked body before her. Something was wrong. Seeing the girl's face, the streams of messy auburn, and the freckles…Elsa realized what it was. She had just "fed" from her own sister.

Elsa immediately scrambled away, her heart pounding in her chest. Her mind buzzed with sudden awareness. Blood was dripping down her chin and lips, and the same red moisture was glistening on her sister's neck where a bite wound was open and wet.

Elsa stared in horror. What had she done and how!? She shook her head and covered her mouth. What was happening? Why was she drinking blood from her sister, not to mention a person in general?

Even now, heat was radiating between Elsa's legs. A tent had formed in her boxer briefs, and it didn't seem like it was going to go away any time soon. Why did she even have this…thing… between her legs? Elsa's attention drifted to Anna as the young girl whimpered in her sleep, shifting in discomfort.

Her tiny tank-top had slid down, revealing one of her nipples. It was pink and hard, and so small. Elsa wanted to wrap her lips around it and suck. Anna's cheeks were a soft red and her lips were partially spread, glistening with saliva. Anna looked painfully innocent, unaware of the predator that'd just been taking advantage of her. Her own sister.

Elsa's mouth watered at the sight of Anna's red-splattered throat. She wanted to drink more. Her disgust, confusion, and self-hatred wrestled with the need to feed and take what she pleased. Elsa hissed at herself in frustration, then froze. How had such an inhuman sound come from her own throat!? What the hell was going on!?

And dammit, why did Anna's blood look so good!? Not to mention, that delicious taste…

Elsa's body moved on its own. She leaned over her younger sister and took one last, long, and needy lick. Moaning softly, Elsa cleaned up the remaining red fluid from her sister's neck. As she was doing so, her arousal flared but she was able to force herself away before she did anything else she'd regret. She quietly fled to the doorway and took one final look at what had apparently been her meal for the night.

The penis between Elsa's legs, which shouldn't have been there in the first place, strained and screamed as if desperate for attention. It was an unbearable, unfamiliar feeling and Elsa couldn't stop herself from eyeing Anna hungrily from her spot by the bedroom door. Resisting the urge to walk back over and lay with her sister was nearly impossible.

She didn't necessarily have to touch the girl to get satisfaction. She could just jerk off near her…Onto her chest, or maybe her face. No, her cute and soft breasts were a much better option than either of those. Anna would never even know, because she'd clean up after herself of course!

Wait, no! What was Elsa thinking!? She was going to punch herself if this continued.

The older sister escaped from the room, trying to catch her breath and get the scent of blood – not to mention the taste- out of her brain. Every time Elsa closed her eyes, she pictured her delicious sister in her head. Wait, no, not her "delicious" sister. Just her sister sister. No food or sex themed adjective included!...

Damn it, what was wrong with her!? Elsa silently slipped into her own bedroom, her eyes wide with terror and heart pounding in her chest. Before she slid back into bed, she took a little detour to her personal bathroom.

A different person than normal stared back at her from the mirror. Elsa looked so strange: her pupils were dilated and narrower than normal, her skin unnaturally pale and glistening with a sheen of sweat. Then, she realized she could see everything so clearly. The deepest parts of her eyes, every speck of color, and every individual strand of ice-blond hair on her head even though it was pitch black. Elsa shook her head. That was impossible, especially since the chance of her having to get glasses in the coming years was extremely high.

None of this could be happening. The blood sucking, seeing everything perfectly, wanting to fuck her own little sister- none of this could be real!

Elsa smiled weakly, trying in vain to comfort herself. She tried to remember the events of today, to try and come up for a logical conclusion as to why this was happening, but she couldn't remember much. She recalled coming home yesterday, waking up, going to school, and then… nothing. Heart hammering, Elsa gazed at the blood still coating her mouth.

Vampires didn't exist. Elsa certainly wasn't a vampire. She hadn't been one the night before, and she wasn't one now. This was a dream. It had to be. That was the only logical explanation for this. Elsa needed to sleep. She was sure that when she woke up everything would be okay. There'd be no cock between her thighs, she'd have no sexual desire for her own little sister, and no intense hunger for blood!

Everything would be normal again.

Everything was not normal again.

It tasted so gross! The cereal, which was her favorite, that Elsa dipped into her mouth was just plain disgusting. The blonde's stomach turned as she forced another spoonful down her throat, shoveling it in as fast as she could to hurry the process up. Elsa's throat tightened, bile rising, and she paused with a revolted expression. She was going to be sick. Her stomach growled with protest, begging for mercy. Elsa trembled as she realized she wanted something more… red. That thought process made her hurriedly spoon more of the soggy food down her throat.

Elsa paused when she heard a loud cough across from her. She looked over to find her dad staring at her with tired, confused eyes. "So, we're just going to pretend like you didn't skip school yesterday?" Her father asked suddenly, scratching at his scruffy jaw. He looked more confused than angry.

Elsa was so confused. What was he going on about? She hadn't been at school yesterday? She couldn't even respond to this because it was all a blur. Elsa hesitated and struggled to come up with a feasible answer to her father's odd question. "Did something happen?"

"Hmm…Elsa." Her father seemed to consider his words carefully, "Elsa, you can talk to me, you know. About anything."

Elsa looked him in the eyes and slowly nodded. She could talk to her very reliable dad about most things, yes. But not about this. When she was silent for too long, he looked away.

"Well, please don't make skipping class a repeated, everyday thing. I understand needing a mental health day every once and a while, but it can really affect your future if you make it a routine."

Elsa was distracting by the sound of creaking wood. She looked toward the source, her frost-blue eyes narrowing. A mouthwateringly delicious smell hit her. Elsa gripped the edge of the table, breathing heavily. She forced herself not to jump up, her body twitching. Her mouth began to ache…a few seconds later Elsa felt her canine teeth lengthen and curve. Between her thighs, it also lengthened. Elsa cursed herself as Anna emerged from the staircase, yawning heavily.

She looked as beautiful and innocent as ever. Her skin was full of color, her teal eyes large and cheery. Her ginger hair was tied cutely in twin braids. She was completely unfazed by what had happened last night.

"Morning," Anna chirped, gracing both Elsa and their father with a warm smile. Elsa didn't respond. She couldn't.

It took every speck of willpower she had not to jump on Anna, tear her uniform off her, and bury her teeth into that soft unblemished neck and drink. She was hungry, thirsty, and impossibly aroused.

'I need help. I need serious help.' Elsa laughed internally, because what could she possibly say to anyone to explain her current predicament? "Oh hey, I drank my sister's blood last night, have sprouted a penis, and want to fuck her. Any meds you could give me for that?" Elsa could already feel the strait jacket being slipped onto her.

"Dad, if you don't get going, you'll be late for work," Anna informed their dad, looking at her cellphone while she toasted what Elsa assumed was a bagel. Their father blinked slowly, then gazed at his wristwatch. His tired look instantly disappeared, and he adjusted his tie as he stood. He pulled on his jacket, headed to the door, and quickly put his shoes on.

"I lost track of time," he blurted. Elsa rolled her eyes and couldn't stop herself from smiling. Her father was an airhead. Honestly, it's probably where Anna got it from. "Make sure Elsa actually gets to school, Anna."

Anna just nodded and smiled, waving at him as he dashed outside. A peaceful quiet remained once the roar of his car ceased. The two sisters were completely silent, caught up in their own business and thoughts.

Elsa suddenly pushed her cereal bowl away. Her stomach ached and her mouth watered. She stared at Anna, who was leaning back against the counter and looking at something on her phone screen. Elsa slowly dragged her eyes up and down her younger sister's body. Anna had such a soft, gentle form: subtle curves and a slender frame…Right now she was wearing a skirt that was too short. It showed off her creamy legs, covered by nothing but a pair of knee-high stockings. Elsa wanted to just bend her over and-

Elsa mentally slapped herself. 'Stop it, stop it, stop it! That's your sister you're thinking about like that. That's Anna.' What was wrong with Elsa?! What was up with this sudden attraction to her own sister?

"I've been wondering. What happened yesterday, Miss Rebel?" Anna teased. Elsa blinked. She held Anna's gentle gaze and flushed. She thought Anna was talking about the drinking of her blood for a moment. Elsa sighed with relief when she realized her sister was talking about Elsa's supposed absence from school the day before.

"Not really sure. Just needed a day off, I guess." Elsa sipped at her previously untouched glass of milk. She nearly threw up. Forcing back a groan, she pushed the cup away from herself. 'I want blood. I want it bad.'

"Oooh, so you wanted a day off with Hans? You naughty girl." Anna giggled. Elsa blinked, who in God's name was Hans? She stared blankly and Anna raised a brow. She seemed equally confused, as if she was starting to question herself. "Umm…that new kid…"

Elsa scratched the back of her head. "Uhhh?"

"The rich new boy? The one you left school with…? Ugh! Why aren't you remembering this?" Anna sighed when Elsa continued to respond with a confused silence. "Anyways, Miss Awkward. I, um… I think something happened last night…Like, an animal got into my room or something…" Anna sounded scared.

Elsa drank more milk. Her stomach turned and she coughed awkwardly as she set the cup down and laughed.

"Oh? Why do you say that?" She couldn't tell Anna that she was the animal! Anna was her precious little sister, if she knew Elsa harbored these filthy feelings and urges, she would be horrified. Their relationship would never be the same! Elsa couldn't tell her the truth- it just wasn't an option! Even so, Elsa wanted to because her little sister sounded so terrified. Anna stared at Elsa; she ran her eyes along Elsa's face, then her shoulders slumped.

"You don't sound interested at all," she said softly, "sorry that I bore you so much lately…"

"No, I'm sorry, I'm just tired is all," Elsa replied quickly. "I could never lose interest in you…"

'I've got to work on my act. I can't have Anna thinking I hate her. Not when I love her more than anything. I have to try harder to act normal.'

"Please tell me, and I'll talk to dad about it." At first, Anna brightened. Then, her face turned beet red.

"Well I um…I woke up this morning and there was…dried blood on my neck. And teeth marks. The thing is…I think maybe it's a human's- Know what? Never mind. Just ignore me, I'm being stupid." Anna went silent just as her bagel popped out. She grabbed it, hastily spreading on a layer of cream cheese. The sisters fell into a strange, uncomfortable silence once again.

To be honest, Elsa had no clue what she was going to do about this whole mess. There were so many things going wrong right now. Elsa was constantly trying to stop herself from jumping her sister and literally eating her while having sex with her. With a penis. That shouldn't be there! And now this strange Hans? And Elsa, skipping school? She would never! And of course, there was this skirt problem now!

She had a very painful erection and a very short uniform skirt. And judging by her "size" this wasn't going to be a very easy to fix problem. Elsa stared into her bowl of cereal, brainstorming solutions to these many problems. Anna was talking again now. Elsa closed her eyes and blanked it out, rubbing her temples. Anna's sweet voice was making her condition even worse. She exhaled deeply, drying to calm herself down. Breathing in undid all her work. Elsa's fangs lengthened when she inhaled, and her sister's sweet scent filled her nose.

"Elsa?" The older sister leapt up when Anna's hand grazed her shoulder. The sensation was way too good, and way too powerful. Elsa shoved the girl away, baring her fangs. "Don't touch me!"

Anna gazed at her, shocked. Elsa froze in place, pained by her sister's heartbroken expression. She couldn't believe what she'd just done! Horrified, Elsa escaped the kitchen, racing down the hallway. She practically dove into the bathroom when she reached it, and slammed the door shut behind her.

Elsa breathed harshly, staring at herself in the mirror. Her pupils were as dilated as they were the night before. Her fangs were very long, and very sharp. She had just screamed at her sister, pushed her away even. What had Anna even been talking about? She supposed it didn't matter...

The ice-blond girl inhaled sharply, painfully aware of the blistering heat growing between her thighs. Shit. She couldn't pay attention to it, she refused to. It was wrong. This whole situation was wrong…but she was so hungry!

Elsa groaned, then she gave up on holding herself back in the very next second. She didn't care if it was messed up! It'd be more messed up when the entirety of her school noticed giant penis she'd sprouted. Honestly, Elsa pitied boys. Dealing with a penis was hard work, and she'd only had one for a day – of that. Then again, boys didn't usually wear a checkered short skirt with panties. She pushed said skirt up and her undergarments down.

This was so messed up.

Elsa closed her eyes and reached down, wrapping her first around her cock. All she had to do was pretend it was some guys… Horrified, Elsa's eyes snapped open. That was even worse! That was way frickin' worse! Elsa had known she was a lesbian since she was thirteen. These…thingies grossed her out. She stared at the penis poking from her body in the mirror.

'Come on, it's just a dick.' The filthy party of her brain whispered.

'Yeah, my dick! Which I shouldn't even have!'

'Welllll, what are you going to do? Leave it there, all hard and hangy?'

'Well no, but-' Elsa's strange internal argument ended when she heard her sister's voice through the bathroom door.

"Elsa, you coming to school?" Anna asked softly. Oh god, the sound of her voice was doing amazing things to Elsa's body! The older girl didn't hesitate, now. She reached between her thighs and gripped herself.

"S-sorry for being an asshole. I'm just a bit, uh, down is all." Elsa swallowed hard. It was the opposite…technically she was "up" (well, one part of her) and that was the problem! Elsa squeezed her eyes shut. She was sick. She comforted herself with the knowledge that there was a huge chance she wasn't even human, not anymore.

"It's okay, Els. You're not perfect. I understand."

Her sympathetic, sweet voice was just way too much, damn it! Elsa bit her bottom lip hard, then laughed weakly and gripped the counter. "Sis, could you uh…just talk about…stuff. I want to hear your voice. It…makes me feel better." There was a moment of awkward silence. Elsa wanted to bang her head on the wall until she died. She'd really done it now, she asked her completely innocent and unaware sister to talk to her while she…!

"Sure." She could hear Anna's smile in her voice. "I'm glad I make you happy."

Guilt came with the arousal. She stared down at the thing between her thighs. "I hate you, you son of a bitch," she growled. It said nothing. She glared at it. Why the hell did the nasty thing have to be so fucking big? She scowled. "Don't look at me like that…You're the one who likes her voice, don't you judge me," she muttered, then sighed and squeezed her eyes shut. Her sister spoke happily about…nothing really. Grades, kids she knew…she blanked out what Anna was saying after a few moments, and instead focused on just the sound of her voice.

Elsa hesitated one more time, before she gripped her length and began to move her hand up and down it. She nearly cried out at the pleasure that suddenly hit her, biting into her bottom lip, hard. She jacked off, quickly, resting one hand onto the porcelain bathroom sink for support.

"Fuck, fuck, Anna!~" Elsa whispered under her breath as she tightened her grip on her throbbing erection. Her whole body was hot and burning. She leaned her head back as she pictured Anna crouched between her thighs with her mouth on Elsa's erection. It was sick, but the idea was extremely hot.

'You're a sick person, Elsa Snow. A sick, sick person.' Elsa could easily imagine Anna's gentle, loving expression as she sucked on Elsa's cock. The thought made her drip even more pre down her fingers. The sound of Anna's voice made the fantasy even better. Elsa could practically hear Anna's voice whispering those naughty things from her fantasies...

"Do you like my mouth on your cock?" Fantasy-Anna whispered as she squeezed Elsa in her hands, massaging her aching flesh firmly but gently and running a thumb over her soaking head. Elsa groaned and bit into her plump bottom lip. Her wrist hurt from how hard and fast she was moving it. Why couldn't she come? Come on, already! Elsa focused on the horrible, twisted fantasy.

"I'm going to cum in your mouth, swallow it all" Elsa whimpered. The idea of Anna swallowing her load made Elsa groan deeply. She quieted herself when she realized she was probably being too loud and prayed that Anna didn't hear her. "I'm going to cum," she whispered softly, "so close…so close."

She felt her body reach its peak and then - nothing. Absolutely nothing. It was like she was suspended in that moment right before an orgasm; her cock hard as rock and dripping Cowper's fluid from the tip. The ejaculation never came. Elsa gasped, eyes squeezing shut, shaking wildly as she gripped the sink. Holy ducking crap, she couldn't come! What the hell!?

His voice suddenly invaded her mind, steady and quiet: "There are a few notable 'things' that come with being a vampire. A. You can only feed from one person until that person has…passed. For the entirety of your immortal life. They live if you feed. Meaning, you can kill yourself and not feed and therefore they'll age. But if you feed from them, you're essentially preventing them from aging. Also, you only can have sex with that one person for the same reason. They're the person you feed from. You can't cum from anyone else's hand, or mouth, or vagina or any other body part. Not even your own. You get the point, so you must choose wisely. You still interested? Oh, you could also grow a dick but you're a lesbian so I'm sure you don't mind."

Elsa stared at herself in the mirror. She remembered her response to his bombardment of facts. Her doped up, weed-induced response but a response, nonetheless. Simply put, Elsa had said yes.

What kind of statement was "you're a lesbian so I'm sure you don't mind!?" anyways? What did that even mean!? So, Elsa had consented while not even sober. That fucking asshole! This Hans guy took advantage of her.

Fuck. This all was real. And so was last night.

Elsa remembered waking up, alone, and walking home. She remembered the intense, powerful hunger in her body and remembered walking past Anna's room and looking in. Her beautiful sister had been asleep. Elsa had noticed how delicious she looked. How yummy her neck looked, and she had crept over and dug her teeth in.

Wait! If Hans's words were true, Elsa was going to be stuck feeling incestuous for her sister until she died! This was the worst! She couldn't orgasm, so she was essentially going to be stuck in a pre-orgasm state all fucking day? Elsa shook with a mixture of so many emotions. Elsa knew one thing, for sure: She was going to kill Hans. She was going to kill that damn immoral, immortal bastard!

"Elsa?"

"Hi. Uh, Anna. Can you…grab me some pants please?"

"Sure, I guess!" Elsa leaned her forehead against the wall and waited for her sisters retreating footsteps to return.

Hans laughed at her.

"Wow, you fucked up." He giggled, then pat her back. "Sadly. I can't fix you. There is no real…fixing. I've been trying to get 'fixed' for the past, let's see, hundred years I believe?" He shrugged. "Me and my boyfriend Kristoff, we really don't hit it off anymore, y'know? He tried to run away last week. He's been in my cellar, tied down, since. Like a juice box, y'know?"

Elsa didn't register what he was saying, she simply stared at the desk in front of her. Hans put his arm around her, grinning ear to ear. "Don't blame me, I asked you if you were sure."

"I was high, trash boy."

"Relax girl, you can just starve to death if you really don't want to be a vampire!"

"But I don't want to die!" She whispered harshly, crossing her arms. Depressed, she buried her face in them on her desk. Tears dripped into her sleeves. She was fucked beyond all possible belief. This was horrible. What and who even was Hans!? He claimed he was a mixture of incubus and vampire and had apparently turned her into the same thing. It affected everyone differently, but it usually gave human females a very fertile penis and an extremely powerful libido.

Elsa banged her head on the desk. She just didn't have it in her. She'd always been told she was weak-spirited, and this just proved it. She had already given up. She wouldn't kill Anna, but Elsa also refused to drink or fuck her for the rest of eternity. She would rather die…in fact, she'd do so gladly.

"I will be taking your pants," Elsa muttered. Hans blinked, stroking one of his sideburns with his well-manicured fingertips.

"…What?"

"I was told today that I have to wear the uniform," she explained thinly. "I have a skirt. Since I am not going to be walking around with a dick in a skirt, I expect you to give me your pants."

"I'm not wearing a skirt, Elsa. For the same reason." She curled her fists into balls and glared.

"You will be or so help me god, I will make your life hell. I will track down this…Kristoff fellow, and I will end him. What will you eat then?" He stared, then a slow smirk appeared on his face and he sat back in his seat, eyeing her from head to toe.

"You are an evil, evil woman Elsa."

She smirked, "Apparently I'm not a woman now, since I have a penis." He raised a brow, then ran his fingers through his ivy-league styled hair. "So, are we agreed here?"

He hesitated for a long moment. "I could just kill you," he murmured, "That's an option too."

"Or you could do me a favor and give me your pants. Come on, you owe me."

"It was a pretty dick move doing it when you were high, emphasis on dick," Hans giggled at his own pun, "…not to mention coercing you into getting into said state." She stared, brows low and knit together. He caught her gaze and shrugged, tossing his hands in the air. "Ugh, fiiine, but I am buying more pants. Don't expect me to wear a skirt for the whole school year."

She literally couldn't have cared less what he was going to do. She was thinking about her future, not his. She buried her face in her hands. She wanted to cry.

"…Hey, why so down? You can always do what I did at first...you can feed from her while she's sleeping. Of course, with the whole permanent boner thing you are fucked but that will stop you from starving to death so you should be thanking me. I'm helping you out as best I can." Elsa twitched. If Hans hadn't gotten her into this position in the first place, she wouldn't need help! The blonde smiled thinly and forced back her anger.

Elsa wasn't like Hans. She would never take advantage of her sister like that. While she was sleeping- that was just sick. And she'd be literally freezing Anna's growth!

She would never do that to her sister, no matter how hungry she got.

"I'll only take a teensy, tiny sip of her blood," Elsa whispered to herself.

She swallowed nervously as she slowly stepped down the hallway toward Anna's bedroom. She whistled very softly to try and get rid of her nerves, feeling awkward and embarrassed even though only she knew about this. Guilt ate at Elsa, but she was just so hungry. She needed Anna's blood and she wasn't doing this by choice. This whole situation was ridiculous, and she would fix it but for now she just needed a little bit. Elsa's stomach growled eagerly as she slowly opened Anna's bedroom door.

'Come on, you can figure out a way to fix this. She's sleeping, you can't do it like this.' Elsa shut out the sensible side of her brain, and instead focused on how beautiful her sleeping sibling was.

Anna was dressed rather scantily. Her pajama shorts were so short they didn't even reach the bottom of her thighs. Topside, she wore nothing but a crop top that showed off her toned, athletic stomach. Her ginger hair wasn't braided like it usually was, cascading down her slender shoulders. And to top it all off, Anna's legs were partially spread, displaying pure white, muscled thighs that Elsa wanted to kiss and bite so badly it hurt. In the darkness, Elsa could make out every freckle -every drop of sweat- on Anna's beautiful, porcelain skin.

Anna had no right being so gorgeous.

Elsa trembled as she hesitantly slid onto the bed. Anna's breasts rose and fell with every breath, stealing Elsa's ability to breathe. They just looked so delicious. Elsa couldn't help but harden, her eyes sweeping across her sister's delectable body. Taking in everything she could. Anna's nipples were partially erect and poked through the thin shirt she wore. . A mental image of sucking on Anna's nipples until they were swollen in her mouth invaded her mind, blowing everything else away.

Elsa's cock throbbed like a rapid heartbeat and she exhaled, desperately trying to ignore it. She got between Anna's legs, sliding carefully up her body. She forced back a loud moan when the bulge in her pajama pants brushed Anna's crotch. Heart racing a mile an hour, Elsa froze as her little sister shifted and murmured beneath her. Elsa's eyes widened when Anna let put an especially enticing moan.

Elsa stayed perfectly still for a few seconds, waiting. When she felt like she was in the clear, Elsa swallowed hard and leaned down. She captured the girl's throat in her teeth. Elsa wasn't sure if it was a good spot to drink from or not, but she couldn't care less the second she tasted Anna's skin, not to mention her blood.

The vampire's teeth sank in quite easily, and crimson poured like a waterfall between her lips. Elsa eagerly took the liquid down her throat, sinking her teeth in even deeper. She was desperate for more. Then, suddenly there was movement beneath her.

"You bastard! Wait, E-Elsa!?"

Elsa didn't even care, she couldn't! She was so hungry, and she needed more blood. Elsa's narrow, hungry eyes met Annas' wide, frightened ones. Much to Elsa's disgust, it filled her with even more lust. Anna looked so cute when she was frightened. Moaning, Elsa shifted, getting a better angle of Anna's throat with her teeth. Color spread like a wildfire across Anna's pale, freckled cheeks and a moan tumbled from her full mouth. Elsa nearly came at the sound, releasing her sister's neck to lean up and taste-

Elsa froze and stopped right in front of Anna's mouth, eyes wide.

Not kissing Anna was the hardest thing she ever had to do. Every part of Elsa, every instinct, was telling her to claim her sister's mouth as her own. Then, the rest of her body.

"A-Anna, I…I can explain everything. I'm s-so sorry," Elsa whispered, voice trembling. Even with her apology, she ached between the legs. She was so disgusting, lusting and attacking her own sister like this. "You can hate me. You…you can even kill me for being a monster if you'd like. But-"

Elsa reached down, pushing her boxers down to her knees, her eyes squeezed shut. "I need…Anna, I just need to-" Their lips met gently. What? Anna had kissed her first! Her lips were soft and warm. Elsa had never kissed anyone before, and she never imagined it would feel this amazing. The entire concept of kissing had always been mildly weird to her, but now…everything made sense. Anna didn't even care that there was blood dripping from Elsa's lips, she just crushed ran her lips and tongue across Elsa's. The older girl shivered with delight, and Anna pulled away, teasingly biting Elsa's bottom lip.

"I didn't know you had feelings like this for me too, Elsa," Anna whispered. What did she just say? Anna reached down, then froze when she felt the pulsating cock that stuck out from between Elsa's thighs. Elsa swallowed. "I…Elsa…what is that? What were you going to do?" Her teal eyes were full of curiosity, and a tiny bit of fear. Elsa smiled weakly, before she nudged the girl's thighs apart with her knees.

"Please Anna, just let me…" Anna's hand teasingly rubbed along her length of her throbbing cock, stroking the sensitive flesh. Elsa groaned deeply, wetness gathering at the tip of her member, arousal surging through her like a wildfire. Self-hatred ripped through her as she realized what her baby sister was doing. Stroking her cock, kissing her- Elsa had put her sister in such a disgusting, horrible position. She was a monster.

"You need it, don't you?" The ginger girl asked tentatively. "You need it in me."

"Y-yes," Elsa groaned softly, her voice strained. Sweat dripped between her shoulder blades.

Anna stroked her face with gentle fingers, drawing shudders from the older girl. "Then do it. I love you. You can do anything you want to me."

Shivering, Elsa opened her mouth and tentatively leaned towards Anna's throat. Elsa parted her lips and placed them against her sister's neck. She sunk her teeth into a new spot, blood immediately pouring into her mouth. Anna's legs wrapped around her hips, and Elsa arched her back, groaning with pleasure as she felt the girl's sex take her in deep. She groaned.

"I love you so much, Elsa."

Elsa sat up with a start when she heard a loud bang, eyes wide. She exhaled breathily, "So that was…" She covered her mouth with her hand. The heartbreak she felt from such a letdown was indescribable. It was the middle of the night. Apparently, she'd been having some kind of wet dream. Her erection was poking straight up in her pajama pants, making a visible bulge. It throbbed and ached, hungry. The thing practically had a mind of its own…

The blonde vampire exhaled, shaking her head. More importantly, what was that noise that woke her up?

As if on cue, Elsa heard a muffled, panicked, "Shit!" She immediately recognized the voice as her young sister's.

Elsa moved quickly, hurrying from her room. She covered her crotch with her hands as she peeked into the girl's room. Anna was setting something up. She looked over when she heard Elsa's feet creak on the floorboards.

"Oh, hey sis, what's up?" It was terrifying seeing her face right after that dream. It had felt so real. Were Anna's lips that soft in real life? They looked it. Plump and kissable…

"N-nothing," Elsa immediately responded, eyeing the camera in her sister's arms. "I woke up because I heard a bang. What are you doing, Anna?"

"Setting up a camera. I want to catch that person that came in here."

"I thought you said the idea of it being a person was stupid," Elsa said sharply. She realized the rude tone she had taken and swallowed, speaking again, "Why would a person bite you?"

Anna apparently had noticed Elsa's sharp tone and looked extremely annoyed. She set the camera down, "I don't know…maybe it's a sicko with a weird biting fetish? Either way, I know I'm right. Call it a gut feeling. You don't need to understand, Elsa."

"That's stupid, a biting fetish? Next, you're going to say it was a vampire. Grow up, Anna," Elsa hissed. Anger and frustration were surging through her. She didn't want to drink from her sister, but now the option was gone, she wished she could. Because that meant Elsa was going to starve to death. She couldn't sneak in at night. If she did, she'd have to turn off the camera when she drank or destroy it. But then, she was sure Anna would take even more drastic measures. She'd tell dad and get people that shouldn't be involved.

Elsa drifted close, then sat down on Anna's bed. She pulled the covers over her crotch to hide her erection, sighed, and rubbed her face. She was tired. "I'm sorry, I just-"

"No, you're right," Anna muttered. Elsa glanced over, a bit surprised that her rebellious little sister was listening to her. Anna's cheeks were red, and she was nervously shifting in place. Unconsciously, her younger sister tugged her plump bottom lip between her teeth. Elsa nearly groaned out loud, jealous of Anna's teeth. She wanted to bite into that lip, taste that mouth. Elsa shook the thoughts away and tried to be a good older sister.

"I understand your fear, but I'm sure it's nothing, Anna…"

Anna bit her lip again, her teal eyes meeting Elsa's blue. "Then, can I sleep with you, sis?" Anna asked tentatively.

"No!" Elsa immediately responded, her voice far harsher than she intended. Anna gazed back at her, shocked. Then, her face darkened, and she looked away. "…Grow up, Anna."

She didn't want to be cruel, but she had to be. If Anna was in her bed, she'd find out about everything. Then, Elsa would have no choice but to have her way with the girl. To bite her, and slide those toned thighs apart and-

Anna began to tremble... "Look, I know I'm being annoying, but it scared me, Elsa! There are teeth marks! I even had to cover it up so people wouldn't find out!" Anna's hand moved to her neck. Elsa opened her mouth to protest as her sister's fingers undid the bandage on her throat, but Anna peeled it off before the words could escape her mouth. Elsa's eyes widened as she took in the sight of the wound. "Look, these are human teeth marks!"

Somehow, at some point, Elsa had started moving. As she neared her sister, the blood scent consumed her. She slavered, gaze focused entirely on Anna's beautiful throat. The delicious scent hit her like a hammer. Her cock swelled until it was impossibly hard, straining desperately against her boxers. She was a short distance from her sister now. All she had to do was pin her down, dig her teeth in and-

Wait, no! What was she doing!? She couldn't lose control! Elsa panted, freezing in place. She covered her face in her hands. Tried to get the smell and sight out of her mind, "G-get away from me, Anna! I don't want to see it!"

"Elsa, what's going on? You can tell me anything you know, you're acting so strangely…" The soft feeling of Anna's hand on hers was too much.

"Get away from me!" Elsa shrieked, backing away fast. The lust was too much. It was like a tornado inside her, all she could think about was Anna! Anna's delicious blood and body, her soft and gentle voice, her beautiful eyes and adorable freckles, and that soft, ginger hair. It was all too much! Elsa had never wanted anything as much as she wanted Anna in that moment.

Elsa's strange reaction was met with silence. When Elsa looked over, Anna was clutching her forearm, staring at the floor. Elsa was so thirsty, and her stomach ached so badly. She was in pain, and now so was her sister. Hans had to be wrong. She had to be able to drink from other people! What could possibly make that she couldn't!? She'd never heard of vampires only drinking from one person!

She stared at her sister. "I-I'm sorry Anna." Her younger sister raised her eyes from the floor, smiling weakly.

"I shouldn't have…" Then, Anna cut herself off and her jaw dropped. "Elsa, what-what is…that?" She pointed. Elsa looked in the direction she was pointing, which led straight to her…

Elsa gasped and covered herself. "L-Let's pretend you saw nothing. Alright?"

"Elsa, please don't shut me out, just let me-" Anna came toward her now, reaching out. Toward her crotch, specifically.

"No, please just-" For a second Elsa wrestled with her, slapping her hands away. Then, Anna quickly grabbed Elsa's wrists, and-

Elsa moaned as Anna grabbed the twitching, leaking member between her thighs. Anna grasped at Elsa's cock through her pj's and squeezed, sending a shiver down Elsa's spine. Not just once, twice! A painful throb tore through the entirety of her length, and she felt precum drip from the hot tip. If Anna kept touching her, she was going to come in her boxers.

"What is this, Elsa?" Anna asked slowly. Her eyes met Elsa's. Just like in the dream they were full curiosity. Except this time, there was a lot more fear there. Elsa smiled weakly. She didn't know how to respond, so she didn't. Anna's eyes widened further. "Elsa, why the hell do you have fangs!? What is going on!?"

Elsa hastily covered her mouth, trying to back away. But Anna was still gripping her crotch.

'Everything is going to shit!'

"You didn't see anything, J-Just…act like you didn't, so everything can be normal again, OK? I'm the one who bit you, so there's no need to be scared! I'm sorry, so please just let go of-"

"Stop it, Elsa!" Anna shouted, shaking her head. "Just tell me what's going on! Why did you bite my neck, and why do you have a penis!?"

"Stop," Elsa said venomously. "Stop talking now, I don't know!"

Elsa froze when Anna grabbed her by the shirt, eyes flashing with rage. Her face had gotten red as well. Elsa flinched as the girl scowled furiously. She hated when her sister was mad…

"I think I deserve some answers since you frickin' fed off me, you freak! And before you get all sad, I'm sorry. I didn't mean that. Just…explain. Please."

Elsa sighed heavily, shoulders drooping. A full minute of swollen, uncomfortable silence passed where Anna and Elsa just stared at each other. Anna was clearly trying to be patient, but she had her limits.

"Elsa. Are you going to explain why you have a penis and fangs, or no? Because I'm not letting you leave the room until you do."

"It's not simple to explain, I don't really understand myself…"

"Try me, Elsa," Anna said thinly, her eyebrows furrowed. "We have all night."

"…" Elsa sighed. "Well…when I went out with Hans yesterday… we smoked some weed and maybe drank and -"