Sandi showed up to the party already wet. She told her boyfriend she was just going for a couple drinks to celebrate Mike's birthday, but the second she walked in and saw the way the guys were looking at her, she knew she was in trouble. Tight black dress, no bra, thong already soaked between her legs. She wasn't planning to cheat, not really, but when Mike pulled her into the kitchen for a shot and his hand stayed on her ass, she didn't move it.
"Missed you, Sandi," he said, voice low. "Boyfriend let you out alone tonight?"
She downed the shot and grinned. "He thinks I'm being good."
Mike laughed and pressed against her so she could feel his cock through his jeans. "You gonna be good for me instead?"
Ten minutes later they were in the spare bedroom. The door wasn't even locked. Mike pushed her dress up over her hips and yanked the thong down to her knees. He bent her over the edge of the bed and shoved two fingers straight into her pussy.
"Fuck, you're dripping," he growled. "Been thinking about this all night?"
Sandi moaned and pushed back on his hand. "Just shut up and fuck me."
He didn't need telling twice. She heard his zipper, then the blunt head of his cock rubbing up and down her slit. He was thick, thicker than her boyfriend, and when he pushed in it stretched her open in one long, rough thrust. Sandi bit the comforter to keep from screaming.
Mike fucked her like he owned her. Hard, fast strokes that made her tits bounce and her ass jiggle every time he bottomed out. The wet sound of his cock slamming into her pussy filled the room. She could hear people laughing in the hallway, feet passing the door, and it only made her hotter. Anyone could walk in and see her getting railed on Mike's birthday.
He grabbed her hair and yanked her head back. "Say it. Tell me whose pussy this is right now."
"Yours," she gasped. "Fuck, Mike, it's yours. Don't stop."
He reached under her and rubbed her clit in tight circles while he kept pounding. Sandi came hard, legs shaking, pussy clenching around him. Mike didn't slow down. He just kept fucking her through it, using her orgasm to make her even wetter.
When he pulled out she thought he was done, but he flipped her onto her back and climbed between her thighs. He shoved back inside and started fucking her missionary, deep and grinding. Her legs wrapped around his waist on instinct. She could feel every inch of him stretching her, the head of his cock rubbing right against that spot that made her eyes roll back.
"Look at you," he muttered. "Good little girlfriend getting her cunt wrecked at a birthday party. You gonna go home with my cum leaking out of you?"
Sandi nodded, too far gone to pretend. "Fill me up. I want to feel it."
Mike groaned and picked up the pace. The bed creaked under them. He fucked her like he was trying to break her, balls slapping against her ass with every thrust. Sandi came again, this one quieter but deeper, her whole body going tight around him. That pushed Mike over. He buried himself to the hilt and unloaded, hot pulses of cum flooding her pussy.
They stayed like that for a minute, breathing hard. Then Mike pulled out and watched his load start to drip out of her. He scooped some up with two fingers and pushed it back inside.
"Keep that in there," he said. "Don't clean up."
Sandi pulled her thong back on over the mess. It was filthy and she loved it. She straightened her dress, kissed Mike once, and walked back out to the party like nothing happened. Cum was already soaking through the thin fabric between her legs.
She stayed another hour. Talked to friends, drank another beer, felt Mike's cum slowly leaking down her thigh. Every time she moved she felt it. By the time she got in her car to go home she was horny again.
Her boyfriend was waiting up. He asked how the party was.
"Fun," she said, and meant it. She let him kiss her, let him pull her dress off, let him fuck her in their bed while Mike's cum was still inside her. He didn't notice the extra wetness. He just told her she felt good and came quick like always.
Sandi lay there after he fell asleep, pussy sore and full, already thinking about the next time Mike texted her. She knew it wouldn't be the last time she cheated. Not when getting fucked like that felt this good.
