Once Upon A December

Summary: Sesshomaru goes into musk, and his scent leads Inuyasha to him. When Inuyasha goes into heat near him he tries to run, but Sesshomaru wouldn't let him leave unless he was dead. When Kagome see's their display, she goes to Koga. Can Inuyasha make her understand, even though he carries Sesshomaru's child?

Author's note: Just read and enjoy, and yes there is yaoi and incest, don't like don't read. Leave a rude comment and just know I warned you, so don't be stupid.

"Sit boy!" Inuyasha yelped as he fell face first into the ground, groaning as he fought the necklaces powers and sat up. His face was sore as he wiped dirt off from it, the skin almost rubbed raw from being sat four times in a row. Inuyasha was very tired of Kagome's antics, jumping away from her as he took a step forward.

"You crazy whench!" He yelled, Kagome parting her lips to sit him again. Sango came to his aid, touching a hand to Kagome's shoulder. Usually she would just let it happen, but she knew he was right in this argument.

Kagome was angry over the dumbest thing, angry that Inuyasha didn't want to give her a child. The argument wasn't too severe at first, the two arguing outside of their hut as Sango sat inside with Miroku and their three children. Inuyasha started to get defensive when she asked if he could even have children, which he was unsure about.

He didn't know if he could since he was a half-breed, but didn't tell her that. Instead he countered with that he didn't want to have kids till she turned nineteen, which was only a couple months away. She wanted kids now though, their lack of sexual intercourse getting to her hormones. Inuyasha told her he didn't have to do anything he didn't want to, which Kagome grew angry over.

He was sat four times afterwards, which he felt was rather unfair. She was basically telling him he didn't have a choice, and a part of him grew furious at that thought. He had expected her to accept his opinion, but the pain in his back and face proved otherwise.

"Kagome, you can't force him," Sango countered, Kagome blushing as she realized what she had done and how the situation looked. She stormed off, unwilling to say she was wrong. Inuyasha sighed as he rubbed his lower back, Sango walking up to him with a small frown.

"You can't run away from this forever Inuyasha, you have to tell her sooner or later," Sango told him, Inuyasha sighing as he watched Kagome's retreating form. He slowly started to walk after her, in no mood to rush this. He raised his nose to the air when he smelled something sweet, closing his eyes as he breathed in deeply. The scent made him feel intoxicated, Inuyasha shivering as he took in a deeper sniff of it.

"You okay Inuyasha?" Sango asked with a worried look, Inuyasha opening his eyes and looked to the direction of the scent. He nodded as he started to walk towards the scent, his eyes closing again as he felt the urge to roll in it.

Inuyasha forgot about Kagome as he jumped into the air, his body buzzing the closer he got to the scent. He dropped down into the forest in front of a clearing, opening his eyes. His eyes widened in disbelief when he realized the smell came from Sesshomaru, covering his nose as his own body reacted to his musk.

Sesshomaru just stood in the middle of the clearing, his eyes closed as he lifted his nose to the air. His hair cascaded down his back, his usual armor removed. He just wore his kimono and hakama, his nose twitching when the scent of Inuyasha's heat filled the air.

Inuyasha quickly turned away, running away from the clearing and cursing when his body went into heat. He jumped towards his hut, hoping to lock himself inside till his body calmed down. Inuyasha yelped when he was tackled down, looking over his shoulder and a deep fear settling in his gut when he saw Sesshomaru's red eyes.

Inuyasha struggled as his obi was torn, Sesshomaru shocked when he grabbed his blade.

Inuyasha was given enough lead way to push him away, holding his sheathed sword in front of him. Sesshomaru's eyes cleared, Inuyasha panting softly as Sesshomaru's eyes landed on him. Sesshomaru's lips pulled down into a frown, Inuyasha grabbing his hakama and looking to the torn obi as he stood up.

"You are in heat," Sesshomaru stated, Inuyasha frowning as he kept his sword in front of him for protection. He had known he was unable to give Kagome children because he had a heat. He even had a period from his ass, which made him feel like he wasn't worth her time. He was so afraid one day she would see him bleeding and all of his secrets would spill out.

He was so afraid she would reject him, and he would be ostracized from his life. Only Sango knew, since she had walked in on him while he was cleaning himself of his period in a stream. She understood and accepted it, calming Inuyasha's fears. He knew Kagome was not as understanding. Now he was stuck near Sesshomaru who was in musk, and from the way his eyes glowed Inuyasha would be his prey.

Inuyasha had never smelled a demon in musk before, which explained why he blindly followed the sweet scent. He took a step back when Sesshomaru growled softly, Sesshomaru's eyes narrowing slightly.

"So what asshole!" Inuyasha barked, his body releasing his scent heavier when Sesshomaru stood up and moved closer. Inuyasha suddenly felt very small, Sesshomaru sniffing the air. Inuyasha swallowed thickly, Sesshomaru looking over the smaller half demon. Inuyasha felt wetness go down his thigh, his body throbbing in need.

"I would not have thought you go into heat," Sesshomaru said before licking his lips. Inuyasha narrowed his eyes, raising his sword as wind whipped around his blade.

"Windscar!" His power ripped through the ground, but as quickly as he released it, he found himself on the ground, his sword knocked away. Sesshomaru pinned down his wrists as he held down his body with his own, Inuyasha's stomach burning as he felt a hand slip into his hakama.

"Stop it!" Inuyasha yelled out, Sesshomaru tearing his fundoshi and touching the pad of his finger to Inuyasha's hole. Inuyasha would have kicked him but his legs were pinned, his cheeks red as Sesshomaru took his hand out of his hakama. His fingers were stained with wetness, Inuyasha seeing the look in his eyes.

He bucked, managing to get a leg free and turning them over swiftly. Inuyasha got off Sesshomaru and grabbed his sword, scooting back till his back came in contact with a tree. Sesshomaru growled softly as he looked to Inuyasha, the half demon shivering as he kept the sword pointed at him.

"Snap out of it! I'm a disgusting half breed remember!" Inuyasha barked, Sesshomaru narrowing his eyes. Inuyasha hoped he had snapped the demon out of the act he was about to commit, Sesshomaru turning away from him. Inuyasha felt a sudden relief rush over him as he watched Sesshomaru leave, dropping his sword and reeling over with a gasp when his body erupted with pain.

His urge to mate was so powerful it hurt, Inuyasha looking up to Sesshomaru's retreating form. He whimpered pathetically, something inside of him taking over.

"Sesshomaru," he called softly, turning onto his back as he presented his body to the demon. Sesshomaru had stopped walking, a shiver going through his body.

"Sesshomaru," Inuyasha called again, a small whimper escaping him. Sesshomaru was at his side in a second, the demon picking Inuyasha up and jumping away from the clearing. Inuyasha rubbed his face against his chest, his mind screaming for this to stop.

Sesshomaru stopped in front of a cave, Inuyasha laid down on the ground. Inuyasha's ears twitched and fell back as he spread his legs, Sesshomaru shivering in want as he tore off Inuyasha's hakama. Inuyasha whimpered, Sesshomaru looking over his body. He opened Inuyasha's haori and kimono, looking over Inuyasha's well built body.

Sesshomaru looked to Inuyasha's face, his mind trying to tell him to stop this before it got to far. Sesshomaru knew this person was Inuyasha, he knew he should be disgusted by the idea of mating with him. Sesshomaru looked to where Inuyasha's member jutted from his body, a patch of white fuzz covering his genitals. Something delicious hid beneath it though, and Sesshomaru wanted it.

Sesshomaru bit off his claws from three fingers of a hand, reaching down and feeling the wetness against his fingers. Inuyasha was fully prepared for this moment, Sesshomaru losing himself in his musk once again. Inuyasha almost cheered and screamed in mortification at the same time as Sesshomaru began to undress, Sesshomaru placing his kimono down so they could lie on it.

"Am I your first?" Sesshomaru asked even though he knew the answer, Inuyasha nodding as Sesshomaru moved over him. Inuyasha looked to his member, his mind screaming for this not to happen while his body only spread its legs. Inuyasha exposed his neck, Sesshomaru licking it before putting Inuyasha's legs on his shoulders.

Inuyasha gasped when Sesshomaru bit his neck sharply, his lips jolting forward and his member buried inside of Inuyasha. Inuyasha yelped in pain from being penetrated, Sesshomaru groaning around the flesh in his mouth. Inuyasha felt tears fall down his cheeks as he gripped onto Sesshomaru's shoulders, Sesshomaru letting go of his neck and licking away the blood. The mark was accompanied by a large bruise, Inuyasha's mind becoming foggy as he stopped fighting internally.

He had been marked as Sesshomaru's mate, and no matter how hard he fought he couldn't change that. Inuyasha let his head fall back, his eyes closing as he licked his chapped lips.

"Sesshomaru," Inuyasha whimpered, Sesshomaru shivering on top of him weakly. It was an amazing feeling being inside of his mate, Sesshomaru closing his eyes as he started to move his hips. Inuyasha clung to him as he felt something inside of him burn with arousal. Inuyasha moaned as Sesshomaru started to move faster, his member leaking between them as Inuyasha moved his hips to meet Sesshomaru's as best as he could.

Sesshomaru growled as he moved Inuyasha's legs to his forearms, rising up some as he thrusted harder into his body. Inuyasha cried out in pleasure when he hit something inside of him, Sesshomaru leaning down and kissing his lips. Inuyasha moaned as he wrapped his arms around his neck, his body needing more.

"Sessh, deeper," Inuyasha whispered against Sesshomaru's lips, feeling the shiver that ran through the demons body. Inuyasha legs were dropped and his arms were unwrapped from Sesshomaru's neck, Inuyasha kissing his lips one more time.

Sesshomaru pulled out and turned Inuyasha onto all fours, Inuyasha whimpering as Sesshomaru entered him again. Inuyasha took the heavy pounding he was given, his body covered in a thin sheen of sweat as he came close to a release. He heard a soft gasp and looked up, his eyes seeing a green skirt. Inuyasha tried to snap out of his daze, a loud moan escaping his throat when Sesshomaru tapped something inside of his body.

His larger hands groped Inuyasha's chest, Sesshomaru not caring for the human who watched them in a shocked daze. Inuyasha whimpered when Sesshomaru's hands rubbed over his nipples, Inuyasha crying out as he came. Sesshomaru pinned him down to the ground by his neck, his ass in the air as it was pounded hard.

Inuyasha could see Kagome's shoes from here, his eyes shutting tight as his mind tried to pull itself from the smoky daze. Inuyasha moaned as the position allowed Sesshomaru to repeatedly pass over that spot inside of him, his eyes opening to see Kagome running away.

Inuyasha felt humiliation run over him as he reached out a hand, only to grab the dirt beneath him as Sesshomaru came deep into his body. Inuyasha felt tears fall down his face as he thought of what Kagome might think of him now, Sesshomaru pulling out of him with a soft groan. Inuyasha slowly sat up, wincing from the pain in his back and ass.

He grabbed his clothes and quickly ran away, leaving Sesshomaru alone in the cave. He bathed in a nearby river, shaking as he felt shame run through him in waves. Kagome had saw him mating with Sesshomaru, how the hell could he explain this to her?