I walked into the house after midnight and heard the moans right away. Mom's bedroom door was cracked open, light spilling out across the hallway carpet. I knew that sound. It was the same low, hungry noise she made when she touched herself, but this time there were two voices.
I pushed the door wider. My sister Lisa was on her back, legs spread wide, while Mom had her face buried between them. Mom's ass was up in the air, her robe hanging open, and Lisa's hands were fisted in Mom's hair, pulling her harder against her cunt.
"Fuck, Mom, right there," Lisa groaned. Her tits bounced as she rocked her hips. "Suck my clit like that."
Mom pulled back just long enough to say, "You taste so fucking good, baby girl," then dove back in, tongue working loud and wet.
My cock went rock hard in my jeans. I stepped inside and closed the door behind me. Both of them looked up at the same time.
Mom smiled first, lips shiny with Lisa's juices. "You're home early, sweetheart."
Lisa didn't cover herself. She just spread her legs wider so I could see everything. "You gonna stand there or you gonna come fuck us?"
I stripped fast. Mom crawled over to me on her knees and took my cock straight into her mouth, no teasing. She sucked hard, cheeks hollowing, while Lisa watched and fingered herself.
"Look at that," Lisa said. "Mom's sucking her own son's dick. Dirty fucking whore."
Mom moaned around my shaft and took me deeper. I grabbed her hair and started fucking her throat. She gagged but didn't pull back. When I let her up for air she was smiling, spit running down her chin.
Lisa got on all fours beside her. "My turn."
I moved behind Lisa and slammed into her pussy in one stroke. She was dripping. Mom slid underneath her so they could 69 while I pounded Lisa. Every thrust pushed Lisa's face harder against Mom's cunt. The wet sounds filled the room.
"Harder," Lisa begged. "Fuck your sister like you mean it."
Mom reached up and spread Lisa's ass for me. "Look at that tight little hole. You want both of us, don't you?"
I pulled out of Lisa's pussy and pressed the head of my cock against her asshole. She pushed back, taking me inch by inch until I was buried in her ass. Mom licked my balls while I fucked her daughter.
Lisa came first, shaking and cursing, ass clenching around me. I pulled out and shoved back into Mom's mouth so she could taste her daughter's ass on my cock. Then I flipped Mom onto her back and drove into her soaked cunt while Lisa sat on her face.
We moved like that for what felt like hours. Mom on her knees getting fucked from behind while she ate Lisa. Lisa riding my cock while Mom sat on my face. Both of them on their knees in front of me, taking turns sucking and licking until I shot thick ropes across their tongues and tits. They kissed and shared it, swapping my cum between their mouths.
When I was hard again Mom guided me into Lisa's ass while she fingered her own pussy and talked filthy the whole time. "That's it, fuck your sister's ass. Fill her up. Then I want you to fuck me right after so I can feel your cum in her."
I came deep in Lisa's ass, then pulled out and slid straight into Mom's cunt. The mix of my cum and Lisa's juices made everything slick and nasty. Lisa sat on Mom's face again while I fucked her, and we all came together, loud and shaking.
Afterward we lay tangled on the bed, sweaty and sticky. Mom stroked my cock lazily. Lisa kissed my chest.
"Next time," Mom said, voice low and satisfied, "we're doing this in the living room so we can be loud."
Lisa laughed. "And maybe we invite Aunt Karen. Make it a real family thing."
I was already getting hard again. Mom felt it and smiled.
"Round two," she said, and rolled on top of me.
