After getting us all drunk and high, my girlfriend Kate had made my long-held fantasy of fucking my sex stepmom Betty come true. When my best friend Matt unexpectedly showed up at my apartment, Kate involved him as well and pushed Matt and me double-stuff Betty's pussy. Afterward, it became clear that Kate had intentionally orchestrated the entire evening, so I had just angrily forced her down onto Matt's thick cock.
"Fuuuuuck!" Matt cheered. "I'm having sex with Kate!" he hollered, as he pushed up into her pussy. Betty laughed ruthlessly, as she watched. Matt grabbed my girlfriend's ass in one hand and one of her breasts in the other as he pumped his girthy cock into her cunt.
Kate stared at me with daggers in her eyes, as I held her on top of Matt, allowing him to fuck her, even though I knew she hated him and what was happening. Soon, though, her expression changed. I'm not sure if she simply accepted the fact that Matt was already in her pussy and would be able to lord it over her forever or if the width of his cock started to feel good.
Either way, she smiled at me when I lifted Betty into a doggy position, with her hands on the back of the couch and her ass in the air. I spread her cheeks apart and buried the entire length of my cock in her lubed-up asshole.
Betty's groan was half pleasure and half shock. I wasn't sure whether my dad had ever fucked her ass. Maybe this was her first time, maybe not, but she looked back at me with fire in her eyes. "Fuck my ass harder," she moaned, which elicited a loud cheer from Matt.
"Just when I thought this day couldn't get any better!" he yelled, as Kate rode his cock and he sucked on her tits. Matt held onto my girlfriend's ass, spreading her cheeks wide.
As I continued to slam my dick into my stepmom's ass, she furiously rubbed her clit. I leaned forward and slid two fingers into her mouth, which she sucked greedily. She moaned as I pulled my hand back, smacked Kate on the ass, and slipped one, then a second, spit-lubricated finger into my girlfriend's asshole.
Kate's look turned from surprise to lust, as she fucked down on Matt's cock and back into my fingers in her ass. Betty watched me, biting her bottom lip, and then started shaking with another orgasm. Her asshole clinching down on my dick almost pushed me over the edge as well, but I had another plan in mind.
"Jay, I'm going to bust soon. Should I..." Matt panted.
"No fucking way, asshole!" Kate yelled at him, just as I pulled my cock out of stepmom's ass and my fingers out of my girlfriend's. Kate turned to look at me, confused, exactly at the same time as I impaled my dick into her asshole. I moaned loudly, and, through the thin wall separating Kate's pussy and ass, felt cum spurting up Matt's shaft.
"Fuuuuuuuuuuck!" he screamed, as he pumped rope after rope into my girlfriend's pussy. I was cumming too, filling her bowels with my hot semen. Kate's unexpected double penetration triggered a huge orgasm for her as well.
"Uuuuuuuuuuunnngh!" she yelled, her body shaking from head to toes, but as soon as it was over she bucked her ass back into me and stood up, cum leaking from her pussy and ass. "Fuck you both!" she hissed at Matt and me. "This was about Betty being the slut, not me!" She wiped at her pussy lips, staring at Matt's semen on her fingers. "I fucking hate you right now, Jay!" she sneered at me. "You let that asshole cum in me, and you made me get off on his cock!"
Kate took Matt by the arm, pulling him off the couch, and sat in his spot. She leaned forward and grabbed Betty by the hair, forcing my stepmom's face into my girlfriend's pussy. Betty shrieked in protest, as Kate pointed angrily at Matt and me, yelling, "You two shitheads are going to help me hold her here till she's licked and sucked every drop of your cum out of my pussy and asshole!"