My girlfriend Lisa had always been the sweet, shy type in bed. She liked it gentle, missionary, lights low. That changed the night she saw Marcus's cock. We were at a party, a little drunk, when the talk turned dirty and Marcus, this tall black guy from work, pulled out his phone to show off some pics. Lisa's eyes locked on the screen. Thick, veiny, dark as night and hanging heavy. She didn't say much at first, but later in the car she kept shifting in her seat, rubbing her thighs together.
A week later she asked me straight up. "I want to try a black cock. A real one. Big." I was shocked but hard as hell hearing it. We talked it out and set it up with Marcus. He came over on a Friday night. Lisa wore a short dress, no panties underneath like I told her. When Marcus walked in she was already flushed, nipples poking through the fabric.
Marcus didn't waste time. He sat on the couch and told her to come suck it. Lisa dropped to her knees like she'd been waiting her whole life. She unzipped him and that fat black cock flopped out, already half hard and bigger than mine soft. She wrapped both hands around it and started licking the head, moaning right away. "Fuck, it's so thick," she said, voice already thick with lust. She opened wide and took the head in, stretching her lips. Spit ran down the shaft as she bobbed, trying to take more each time. Marcus grabbed her hair and pushed deeper until she gagged, eyes watering, but she didn't pull back. She kept sucking, hungry now.
I sat in the chair stroking myself while I watched my girlfriend turn into a cock-hungry slut right in front of me. She pulled her dress off and climbed onto the couch, ass up, spreading her legs. "Fuck me with it," she begged. Marcus lined up behind her and pushed in slow. Lisa's pussy lips stretched around that black meat, gripping it tight. She cried out, half pain half pleasure, as inch after inch sank inside her. When he bottomed out she was shaking, pussy creaming all over his shaft. "Oh my god it's so deep," she gasped.
Marcus started fucking her hard, slapping her ass, calling her a white slut for black cock. Lisa pushed back into every thrust, moaning louder. "Yes, use my pussy. Ruin it." Her tits swung as he pounded her, the wet sound of her soaked cunt filling the room. She came first, screaming, legs trembling, but Marcus didn't stop. He flipped her onto her back, hooked her legs over his shoulders and drove in deeper. Lisa's eyes rolled back. She kept repeating "black cock, black cock" like a chant while he stretched her open.
After he filled her pussy with the first load she lay there panting, cum leaking out. But she wasn't done. She crawled over to me, kissed me with cum on her lips, then went back to Marcus's cock and started sucking it clean, getting him hard again. Round two was on the floor. She rode him this time, grinding down until her clit rubbed his pubic bone, taking every inch. "I'm your black cock slut now," she told him, voice raw. "Don't stop fucking me." He grabbed her hips and bounced her like a toy until she squirted all over his stomach.
By the third round she was on her back again, legs spread wide, begging for more cum. Marcus gave it to her, pumping another thick load deep while she came again, pussy milking him. When he finally pulled out her hole stayed open a little, red and used, cum pouring out onto the carpet. Lisa just smiled, fingers scooping it up and licking them clean.
After Marcus left she turned to me, still naked and dripping. "I need more," she said. "Next weekend. Maybe two of them." That was the start. Every week she got dirtier. She started dressing slutty, texting Marcus for quickies, letting him fuck her in our bed while I listened from the next room. She stopped pretending she was just curious. She was addicted. Her pussy belonged to big black cock now and she said it out loud every time she rode one: "I'm a black cock slut. Your girlfriend's a black cock slut."
She started bringing friends home too, other girls who wanted to try it. But mostly it was her on her knees or bent over, taking load after load, coming home stretched and satisfied, ready to tell me every filthy detail. The shy girl was gone. In her place was a woman who lived for the next thick black cock stretching her open and filling her up. And I watched it all, cock in hand, while she became exactly what she wanted: a total, shameless black cock slut.
