New fanfiction! Now, let me make this clear, I have watched some episodes of Adventure Time but I've never seen them all, but I know enough characters-er, well the main ones at least, but I will say I have fallen in love with Marceline x Princess Bubblegum and in love with Prince Gumball x Marshall Lee! This is a yaoi and Mpreg story, so if you don't like either of those things then this isn't for you. For those who do like things like this enjoy!

Disclaimer: I do not in anyway shape or form own Adventure Time!

Prince Gumball sat as his desk he had by the window in his room, his pencil scratching ever so softly against the paper as he wrote across it, looking at his small collection of beakers he had on his desk and back down writing again, something he'd been doing for the past couple of hours. He didn't get bored however, like other people would, he was studying the reactions of his chemicals when mixed and he found it fascinating, maybe more fascinating than people half the time for chemical reactions and experiments just fascinated him deeply.

His crown rested on the small space on his bedside table, allowing his hand to move through his pink hair freely without knocking the crown off and he sighed as he rubbed his eyes, which were strained and tired, his vision doubling faintly once as he blinked gently. As interesting and even fascinating as his little experiment was he needed to go to sleep, he felt very tired after the long day he had and he knew if he didn't get some sleep, in some form, he was going to crash hard and his experiments and chemicals would go off the walls bad, so he put corks in all the little vials putting them in a little tray then stood up sighing out gently.

He walked to his dresser pulling out a drawer grabbing a shirt and he shut it again, he then unbuttoned his shirt and pants letting them both fall to the floor and he pulled his dark shirt over his head and slid his arms through the sleeves little it fall and his light pink skin stood out like a neon comparison to the dark color and, clad in just the shirt and boxers, he turned to his bed only to let out a little squeal he was not proud of and a scalding blush. There, laying across his bed with a large wicked grin and eyes that looked like they could devour him with, hair falling across his brow and into his face slightly as he grinned laid Marshall Lee the Vampire King.

"Wow, I thought you would go much further Bubba, after all I was enjoying quite the view." Marshall purred as he sat up right grinning at the fiercely blushing prince who scowled at Marshall.

"You need to make some noise once in a while. It's so annoying." Prince Gumball snapped out irritatedly as he blushed hotly. "And how many times have I told you not to call me Bubba." That part was said in a mumble that made Marshall's grin widen considerably.

"D'aw Bubba don't be so cruel! Come on over here and I'll make it up to you." Marshall purred out again as he grinned hugely making Gumball's blush worsen and become hotter.

"Just go Marshall. Glob, this is all you ever want I swear it!" He sighed out angrily but still his heart picked up and arousal began to bloom in his lower stomach and spread through his veins and blood flowed down to his member causing it to twitch and stiffen slightly.

"It's not! It brings me great satisfaction knowing I can make you feel very good, as much as you make me feel." Marshall said with the same grin as he looked at Gumball's bright red face and he shifted standing up off the bed walking over to the pink prince and he wrapped his arms around the only slightly smaller boy's waist tightly yet gently pulling the pink body against his own sighing out gently, causing Gumball's hair to ruffle and disturb his hair softly.

"Shut up Marshall. You're so flippin' cliché." Gumball muttered but his face burned hotly all the same as he pressed his lips together and he felt Marshall's chest rumble as his head rested lightly on Marshall's shoulder.

"I may be cliché, but you find it flattering I know you do." Marshall's breath tickled Gumball's ear making the pink haired boy shiver gently at the feeling, his body heating up slowly as his hands began to curl and cling to Marshall's shirt tightly and he had to fight back a groan when Marshall's sharp teeth lightly nibbled on his earlobe, his eyes shutting when the lips slid to the spot right under his ear where the skin was most sensitive, then down across his jaw and neck softly, placing the softest kisses ever before their lips met and it was anything but soft. It was filled with pure lust and even passion as Gumball moaned out shivering gently again his arms wrapping up around the Vampire King's shoulders only to bury his fingers into the soft mass of Marshall's black hair.

He felt Marshall's arms tightening around his waist and he was spun around and backed up onto the bed before he could comprehend it and he tugged at Marshall's hoodie and the kiss broke briefly, their breathes uneven and heavy against the other's lips as Marshall tugged his hoodie off and followed it with his shirt and leaned down catching the pink princes lips in a deep, open mouthed kiss.

Their tongues stroked and fought intensely as Marshall's fingers unbuttoned his pants sliding them down and moved his pale fingers up curling them over the brim of Gumball's boxers tugging them down making the pink haired boy gasp out softly at the cool air hitting his lower half and his shirt was torn from the collar all the way down and Marshall broke the kiss letting Gumball suck in a breath, a small tendril of saliva connected their lips before Marshall smirked wickedly.

He leaned down planting kisses and sucking softly along the prince's collar bone, sucking the color out gently making Gumball moan out as Marshall slowly moved down lapping experimentally at his left nipple before clamping his mouth down around the perky nub suckling on it harshly biting down hard and gently once or twice as his fingers twirled and tugged on the right, neglected nipple making Gumball moan and pant, his erection aching and throbbing for a touch, anything from Marshall as his eyes rolled back from the pleasure. His fingers stayed tangled in his lover's soft hair clenching fistfuls at a time until he groaned loudly.

"M-Marshall...M-More..."Gumball moaned out squirming gently as he panted, his head falling to the left pressing his hot burning cheek to the cool bed sheets. He felt Marshall release his suction on his nipple and smirked at him as he arched his hips up rubbing his erection once against Gumball's making his eyes roll back again.

"Mmm I can see that." Marshall purred but leaned down kissing his lover deeply, as deep as possible, before pressing the head of his erection against Gumball's entrance.

"W-Wait! Don't go in like-like that." Gumball blushed at his own words leaning over to the side table opening the drawer pulling out a little thing of lube handing it to Marshall blushing profusely but the Vampire King just grinned widely.

"I don't know how I always manage to forget how delicate you are." Marshall chuckled as he squirted some lubricant into his hand only to spread it onto his member, a blush coating his cheeks.

He leaned down bracing his arms on either side of Gumball's shoulders as he leaned down kissing the pink prince deeply again as he slid his erection into Gumball deeply and the pink haired boy yelled out in pleasure and threw his head back in ecstasy. Marshall pushed all the way in until his hips pressed firmly against Gumball and the pink prince moaned out loudly biting his lower lip gently and before Marshall could move Gumball moved over in a twisting motion quickly, so his own eyes met with Marshall's now wide, shocked yet completely aroused red eyes which darkened considerably.

"Now what do you think you're doing, Bubba?" Marshall growled out as his hands came up to his sides moving them up the pink colored flesh only to sink them down, his fingers digging into Gumball's hips tightly.

"What does it look like I'm doing." Gumball murmured but grinned widely at Marshall, who's eyes flashed and darkened with arousal as Gumball began moving his hips up and down causing a moan to slip from his lips as his cheeks burned hotter if possible.

He just barely heard the moan that escaped Marshall's lips as his hips arched up to meet every downward thrust of Gumball's making the prince moan. He began thrusting his hips down faster and harder making Marshall also pick up the magnitude of his thrusts, the prince clawed at his thighs lightly which were covered in little beads of sweat along with the rest of his body as he panted harshly shivering hard. Marshall groaned twitching lightly as he thrust upwards meeting Gumball's thrusts, his own breath hitching and escaping his lips in loud pants, the sounds of their flesh meeting and slapping in the movements, the smell of sweat and sex in the room that he was coming to adore in a strange way.

Marshall clenched the prince's hips tighter and moved his hand up wrapping his hand around the pink prince's erection stroking it quickly causing everything to pick up speed rather fast. He was aware of the increase and faster thrusts of Gumball's lifts and drops, was aware of his meeting the thrusts that Gumball was nearing his climax and Marshall would be damned if he didn't gift him with it and his own.

He growled lowly in his throat twisting over planting the pink prince onto his stomach with his hips high in the air and Marshall slammed his own hips forward hard and quick, unable to truly help himself as his bros pulled together tightly and his jaw clenched tight as every howl and scream of his name that left Gumball's mouth pushed him closer and closer to his climax. He panted quick like, huffing almost, as his hips slammed forward faster and faster as his growls became louder, ripping through the sounds of sex.

His skin broke out in surprising tremors and goosebumps as he growled Gumball's name out as his orgasm struck and Gumball screamed his release, the cum splattering up on his stomach and the bedsheets as he trembled hard with the after effects and the feeling of Marshall's own cum filling him to the brim quickly. Marshall pulled out flopping onto the bed next to the panting prince who looked at Marshall from under his lashes smiling slightly making the vampire grin widely. Gumball moved over close too Marshall, burying his body tight into Marshall's like puzzle pieces and he rested his hot cheek against Marshall's sweaty chest, which, he surprisingly didn't mind in the slightest bit.

"You, my dear prince, are full of surprises aren't you?" Marshall murmured groggily as Gumball chuckled out loudly and looked up at Marshall just as groggily.

"And so aren't you. I don't want you to go." Gumball suddenly whined out making his face flush again at the embarrassing out burst but Marshall chuckled and kissed the tip of the pink princes nose softly.

"I know, but I need to go. I don't want too, but I need too and you need to get some sleep now. I'll be back soon enough." Marshall's breath was warm against Gumball's cheek making the prince shiver softly with a brief flash of lust before relaxing as a hand brushed his cheek and Marshall slid out of bed making Gumball pout gently a bit.

"I wish you could stay." Gumball sighed out falling back against his pillows as he sighed again dramatically making Marshall bark out a laugh as he slid his pants back on buttoning them up as his shirt was magically on him and along with his hoodie.

"As do I, sweet prince. But it sadly can't be tonight, I'll see you tomorrow however." Marshall smiled revealing a flash of his fangs as he walked forward and leaned down kissing Gumball softly before pulling away walking to the balcony windows.

"I love you." Gumball said suddenly as he looked at Marshall who seemed surprised before he smiled softly.

"Love you too, now go to sleep. Or tomorrow won't come quick enough for you." Marshall chuckled out but just as he stepped out and shut the window Gumball had already, finally and rather blessedly, passed out cold.