Request by shamonticupcake: Baby Boy!Samcedes where Mercedes accuses Sam of cheating and things get heated... *wink, wink*

AN: This is AU and loosely, loosely based off of the movie Baby Boy when Yvette and Jody argue about him cheating.

Sam crept into the apartment he shared with his girlfriend humming a song that had been stuck in his head since he left the bar. He closed and locked the door before he tossed his keys on the little table in the foyer that held the flowers he bought for Mercedes yesterday. He and his girl had been fighting more often than not recently and Sam knew it was mostly his fault. He had been working later and later hours and then he would hang out with his coworkers after work at a bar down the street. Mercedes wasn't innocent herself; she spent a lot of the day shopping or schmoozing socialites at the country club his family belonged to. He and Mercedes were planning to be married one day, but he had yet to pick out a ring and actually pop the question. He knew she was growing impatient and after a pregnancy scare last month it seemed like all they did was argue. Sam became increasingly stressed out and spent a lot of time giving her and himself some space.

He took only two steps into the living room when the lamp by the couch flipped on and Sam froze in his spot. Mercedes stood next to the lamp dressed in her robe with her arms folded and her eyebrow quirked. He could see the anger radiating in her eyes and he swallowed loudly. "What are you still doing up?"

"Where the fuck have you been, Sam Evans?" she seethed. Sam knew when Mercedes was really upset that she just let the expletives fly out of her mouth. He was in deep shit.

"I was out with the boys," he replied nonchalantly. He didn't seem to find any reason why she would be upset about him being out. It was Friday and he usually went out with his friends on Fridays while she went out with hers. "How was girl's night?"

"We didn't have girl's night tonight. I cancelled."

He raised his eyebrows at her in surprise. "Uhh, why? And why didn't you call me?"

"I did call you, jackass. And it's none of your business why!" she yelled at him.

"Okay, I'm sorry," he relented, holding his hands up as if in surrender. He slipped his phone out of his pocket and noticed the battery was dead. "I guess it died before I left work."

"Who is she?"

Sam whipped his head up and his gaze fell on Mercedes' heartbroken face. "Excuse me?"

Her eyes grew ablaze and she practically growled at him. "I said who is she!" she screamed. "I know you're fuckin' around, Sam! Don't make up excuses! Quinn told me that Puck saw you with another girl so who is she!"

"Look," Sam gritted out, now seething himself. "I'm not sleeping with anyone or even seeing anyone for that matter. I have no idea what Puck is talking about."

"Yeah right!" She laughed humorlessly. "You think I'm going to believe that? Why else would you be avoiding me every chance you get? I barely see you anymore! I know you're fucking someone!"

"I'm not-"

"Don't lie to me!" Her volume seemed to get louder and louder with each syllable. "Who is she, Sam?! Tell me the truth! I deserve to know who you're fuck-"

"Shut up!" He shouted and Mercedes' visibly jumped, startled. Sam never yelled. She lost her cool more than enough times for it to be normal, but Sam was always calm and collected. "I'm not cheating on you, Mercedes! How the fuck could you even think that?!"

"You're never around, Sam! What else am I supposed to think?"

"God, I needed some space!" He exclaimed, waving his arms around him. "I needed some time to fucking think, Mercedes! After the whole pregnancy scare, I needed to put everything into perspective!"

"What's that supposed to mean?" She cocked her hip out and placed her hands on her waist. "You want to break up? You want to move out? What, Sam? What could you possibly need to put into perspective?" She wasn't going to lie - seeing Sam in a fit of rage and having him scream at her was turning her on. She wasn't as angry as she was before, deep down she knew Sam would never cheat on her. He had been cheated on twice and he knew what it felt like. Now, she was just pushing his buttons. "You want to see other people? I see the way women look at you when we go out, you could have your pick of any bimbo lookin' bitch out there! Go ahead!"

That was it. Sam completely snapped at those words. He crossed the room in a few short strides and Mercedes' eyes bulged as he backed her up against the wall. He grabbed her wrists and pinned her arms to the wall on either side of her face. "I'm not cheating on you, damn it!" he snarled, his face so close that their noses were touching. They stared each other down, both of them breathing heavily from the fight they were having.

"Fucking prove it," Mercedes hissed.

It was then that Sam noted the arousal in his girlfriend's eyes. His cock twitched at the thought of angry sex and he smirked deviously down at her. He crushed his mouth to hers, their tongues tangling instantly. He raised her wrists above her head and crossed them, holding them tightly together with one hand as the other undid the sash that held her robe closed. Once it was open, he trailed his hand down her body and pressed his fingers into her already damp folds. Mercedes whimpered into their kiss when he plunged two fingers into her, curling them so they hit her spot with every achingly slow thrust. She scratched at the hand holding her wrists together, wanting to feel him as he finger-fucked her, but Sam refused to let go.

Just as Mercedes felt the twist in her stomach that signaled her orgasm, Sam removed his fingers from her. She groaned at the loss of contact and yanked her mouth away from him. "Fuckin' tease," she rasped. Sam smirked as he used his free hand to undo his pants and took out his throbbing cock. He thrust into her roughly and Mercedes cried out as he began to pound her without giving her any time to adjust. It had been way too long since they had sex. Mercedes tried to raise her legs so she could wrap them around his waist for a better angle, but Sam was moving too quickly and she couldn't get any leverage. Sensing her struggle, Sam released her wrists and placed his hands under her butt, raising her up against the wall easily. Mercedes locked her ankles around his back and they both moaned as he went deeper. Her arms draped around his shoulders, her hands clutching the material of his shirt. Sam moved one hand between them and grabbed hold of her chin, forcing her to look him in the eyes.

"You. Are. Mine." He emphasized each word with a thrust of his hips. "I love you, Mercedes. You. No one else. Ever." He slowed his hips down and rotated them so his pelvic bone was grinding against her clit. "Do you understand me?"

"Yes!" She screeched, her eyes rolling back into her head. "Yes, Sam!"

"Good," he smirked and began thrusting wildly again, seeking out their orgasms. He titled his hips up slightly and felt his cock hit the very end of her which caused Mercedes to scream. Her orgasm wracked her entire body, her legs shaking and her back arching. Sam felt her walls gripping his cock and he fought to push himself in a few more times before he grunted his release, coating her walls with his cum.

A few minutes later they were lying on the floor with a blanket they snatched from the couch covering them. Mercedes was curled up on top of Sam, her fingers drawing lazy patterns on his shirt. "I know you would never cheat on me," she said quietly.

Sam looked down at her as he rubbed her back, loving the feel of her silky robe against the rough pads of his fingers. "Then why the huge screaming match?"

"I'm a diva," she shrugged and they both let out of a soft laugh. "I still don't know why you have been avoiding me..."

"I'm sorry for that," he sighed. "I've been working later hours so I can afford an engagement ring."

Mercedes lifted her head in surprise. "What?"

Sam smiled and caressed her cheek. "I want to marry you, Mercedes Jones."

Her eyes filled with tears and she grinned at him. "You do?"

"Of course," he said simply. "After we found out you weren't pregnant, all I could think about was how disappointed I was because I can't wait until we have kids. But I want to do this right, I want to marry you first. I should have just told you." He looked away and she shook her head, placing her hands on either side of his cheeks so he would look back at her.

"I want that, too. And I'm sorry for freaking out on you."

Sam grinned and kissed her quickly. "So, are we good?"

Mercedes pursed her lips. "I don't know... I might need more convincing..." She raised her eyebrow suggestively and Sam felt his cock rising to attention again.

"Why don't we move to the bedroom then, and I can convince you all night long?"

She giggled and smacked his chest lightly. "You're such a dork."

Okay, how was it? Be honest... I'm not sure how I feel about it, yet...