Relative Pleasures
Copyright© 2026 by Obscene Vices
Chapter 9: Abby Joins In
Incest Sex Story: Chapter 9: Abby Joins In - In the Davidsons' perfect suburban life, Jenny and her sister Mandy have been secret lovers since teens, sharing boyfriends and now their husbands. One night, with the kids supposedly out, the adults start an orgy in the living room. John and Emma return early from a busted party, witness the incestuous scene, and sneak upstairs. Shocked but aroused, they confess desires and have sex, fantasizing about joining the family depravity. No one is safe from the family taboo.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa Fa/Fa Consensual Lesbian Heterosexual Fiction Sharing Slut Wife Wife Watching Incest Mother Son Brother Sister Father Daughter Cousins Uncle Niece Aunt Nephew InLaws Gang Bang Group Sex Orgy Swinging Anal Sex Analingus Double Penetration First Facial Masturbation Oral Sex Sex Toys Voyeurism
Abby pulled up to the Davidson house in her mom’s Honda, the one she borrowed whenever Mandy didn’t need it. She checked herself in the rearview mirror. Lip gloss. Hair down. The white sundress she knew John liked because he’d told her so the last time, his eyes tracking the hemline while Emma laughed at him. No bra. Barely any underwear. Just a thin white thong that was already damp from the drive over, her mind racing with what John might have planned.
A surprise, he’d said. She loved John’s surprises. The last one had been Emma’s tongue between her legs while John fed her his cock, and she’d come so hard she saw stars.
She grabbed her phone and texted him from the driveway.
Here. Door open?
Yeah. Come straight upstairs. Master bedroom.
That was weird. John’s room was down the other hall. Why the master bedroom? Maybe Emma’s parents were out and he wanted more space. The thought of fucking John in his parents’ bed made her stomach flip. She liked that.
She let herself in through the front door, kicked off her sandals, and padded barefoot up the stairs. The house was quiet. Too quiet. Her pulse picked up.
The master bedroom door was ajar. She pushed it open.
And stopped breathing.
John was sitting on the edge of the bed in shorts and nothing else. That part she expected. What she did not expect was her mother, Mandy, sitting beside him in a silk robe that was loosely tied with clearly nothing underneath. And Aunt Jenny on John’s other side, also in a robe, legs crossed, a calm smile on her face, like this was the most normal Sunday afternoon in the world.
“Hey, Abs,” John said. Easy. Relaxed.
Abby’s mouth opened. Closed. Opened again.
“Mom?” Her voice came out small. “What are you ... why are you...”
Mandy stood up. Her face was flushed, eyes bright, hands shaking slightly, but she walked toward her daughter with a steady purpose that Abby had never seen before. Not this version of her mother. This version looked like a woman who had recently been fucked senseless and had decided she wanted more.
“It’s okay, sweetheart,” Mandy said softly. She stopped in front of Abby and reached up to brush a strand of hair from her daughter’s face. “Jenny told me everything. About you and John and Emma. About what you did together.”
Abby’s face went white. Then red. Then white again. “Mom, I can...”
“Shhh.” Mandy put a finger on Abby’s lips. “I’m not angry. I’m not disgusted. I’m not here to yell at you.” She took Abby’s hands in hers. “I’m here because I want to be.”
Abby looked past her mother at Jenny, who gave her a warm, encouraging nod. Then at John, who smiled at her the way he always did. The smile that made her knees go weak.
“Want to be ... what?” Abby whispered, though she already knew. She could feel it in the charge of the room, in the way her mother’s thumbs were stroking the backs of her hands, in the way Mandy’s robe gaped at the chest. Abby’s eyes went there before she could stop them.
Mandy saw it. She saw her daughter’s gaze drop to her breasts and linger for a fraction of a second. And something in Mandy’s expression shifted from nervous to certain.
“I want to be with you,” Mandy said. “The way Jenny is with Emma. The way I’ve been with Jenny since we were your age.” She squeezed Abby’s hands. “You don’t have to do anything you don’t want. You say stop and we stop. But I need you to know that I want this. I want you.”
Abby was shaking. Not from fear. From the collision of everything she’d fantasized about since Emma first told her about their parents and everything she’d told herself she could never have. Her mother. Standing in front of her. Asking for this.
“Mom...” Abby’s eyes were wet. “I’ve thought about it. Since Emma told me about you and Aunt Jenny. I couldn’t stop thinking about it. About you. About what you look like when you...” She couldn’t finish. Her cheeks burned.
Mandy cupped her daughter’s face with both hands. “When I what, baby?”
“When you come,” Abby whispered.
Mandy kissed her.
It was gentle at first. A mother’s lips pressed against her daughter’s. Soft and warm and careful. Abby stood rigid for one second, two seconds, and then her body unlocked all at once. Her hands came up to her mother’s waist, gripping the silk robe, and she kissed back. Mandy’s tongue traced the seam of Abby’s lips, and Abby opened for her with a small whimper that made John’s cock twitch from across the room.
Mandy tasted like coffee and vodka and something sweet underneath that was just her. Abby pressed closer, her tongue meeting her mother’s, tentative at first and then bolder, and the kiss deepened into something that was no longer gentle. Mandy’s hands slid from Abby’s face into her hair, pulling her closer, tilting her head, and Abby moaned into her mother’s mouth.
Jenny watched from the bed, her hand resting on John’s thigh, squeezing. “Look at them,” she murmured, her voice thick.
John couldn’t look away. His aunt and his cousin. Mother and daughter. Kissing like the world was ending. Mandy’s robe had come undone and fallen open, her bare body pressed against Abby’s sundress. Abby’s hands were roaming now, no longer just gripping the robe but sliding underneath it, touching skin, exploring the body that had made her.
Mandy broke the kiss, breathing hard. She looked at her daughter with eyes that were dark and hungry and full of love. “You’re so beautiful, Abby. You have no idea how beautiful you are.”
“You’re the beautiful one, Mom.” Abby’s voice was rough. Her fingers traced the curve of Mandy’s breast through the open robe, and Mandy shivered. “Can I ... can I see you?”
Mandy let the robe fall. It slipped off her shoulders and pooled at her feet, and she stood naked in front of her daughter.
Abby stared. She’d seen her mother’s body before, obviously. In passing. In changing rooms. At the beach. But never like this. Never offered to her. Never displayed with intent. Mandy’s breasts were full and perfect, nipples hard, stomach toned, the smooth mound between her legs glistening with visible arousal.
“Oh my God, Mom,” Abby breathed.
“Your turn, sweetheart,” Mandy said, reaching for the hem of Abby’s sundress.
Abby lifted her arms and let her mother pull the dress over her head. No bra. Just the thin white thong. Mandy hooked her fingers into the waistband and eased it down Abby’s legs. Abby stepped out of it and stood there, naked, chest rising and falling fast.
Mother and daughter. Bare. Facing each other.
“You look just like me,” Mandy whispered, her eyes traveling over Abby’s body. Lingering on her small, perfect breasts. The pink nipples. The smooth skin between her legs. “When I was your age. Exactly like me.”
“That’s what Aunt Jenny said too,” Abby murmured, and they both glanced at Jenny, who was watching with glistening eyes and one hand already between her own legs.
“She’s right,” Jenny said. “You’re Mandy at eighteen. It’s like looking back in time. And it’s making me incredibly wet.”
Abby laughed. A nervous, breathless sound that broke some of the tension. Mandy laughed too, and then they were kissing again, and this time there was nothing tentative about it. Mandy pulled Abby against her, bare breasts pressing together, nipples brushing, skin on skin. Abby gasped at the contact and deepened the kiss, her tongue pushing into her mother’s mouth with a hunger that surprised them both.
Mandy walked Abby backward toward the bed, their mouths never separating, until the backs of Abby’s knees hit the mattress and she sat down hard. Mandy followed her down, climbing over her, legs tangling as they fell together onto the sheets.
John and Jenny moved aside to give them room, settling against the headboard, watching. Jenny had shed her robe and was naked, legs draped over John’s lap. John’s hand rested on her thigh, but his eyes were locked on Mandy and Abby.
Mandy kissed down Abby’s neck, tasting faint salt and something floral. Her perfume or her shampoo. She reached Abby’s breasts and paused, looking up at her daughter.
“I’ve wanted to do this,” Mandy confessed, her voice barely audible. “More than I should.”
“Do it, Mom. Please.”
Mandy took Abby’s nipple into her mouth and sucked. Abby’s back arched off the bed, hands flying to her mother’s hair, a sharp cry escaping her. Mandy worked the nipple with her tongue, circling, flicking, sucking hard enough to make Abby whimper, then moved to the other breast and gave it the same attention.
“Fuck!” Abby gasped. “Mom ... your mouth...”
Jenny leaned into John, her lips brushing his ear. “How does it feel watching them?”
“Like I might come without being touched,” John admitted, his cock straining visibly against his shorts.
Jenny’s hand slid to his lap, fingers wrapping around him through the fabric. “Don’t you dare. I have plans for this cock.”
On the bed, Mandy was kissing lower. Down Abby’s stomach, her lips tracing the faint stretch of muscle, the soft curve below her navel. She settled between Abby’s legs and looked up at her daughter one last time.
“Are you sure, baby?”
“Mom, if you don’t put your mouth on me right now, I’m going to lose my mind.”
Mandy smiled and lowered her head.
Her first lick was slow and deliberate. A single flat stroke from Abby’s entrance to her clit that made Abby’s entire body jolt. Mandy moaned at the taste, her eyes closing. Her daughter. She was tasting her daughter. The thought should have revolted her. Instead it made her pussy clench so hard she almost came untouched.
She licked again, slower this time, her tongue parting Abby’s folds, exploring every ridge and crease. She knew this terrain instinctively because it was her own, mapped onto the body she had created. She found Abby’s clit, swollen and throbbing, and circled it with the tip of her tongue.
“Oh God, oh God, oh God...” Abby’s hips bucked, her thighs clamping around Mandy’s head before she forced them open again, spreading wider, giving her mother everything. “Mom ... yes ... right there...”
Mandy sealed her lips over Abby’s clit and sucked while sliding two fingers inside her. Abby was soaking, the wet sounds obscene in the quiet room. Mandy curled her fingers forward, finding the spot she knew would be there because she had the same one, and pressed.
Abby screamed. Not loud. A choked, broken sound of pleasure so intense it bordered on pain. Her back bowed off the mattress, fingers twisting in the sheets, toes curling.
“She’s close already,” Jenny observed, her hand now inside John’s shorts, stroking him with slow, firm pulls. “Look at her face, John. That’s what Mandy looks like when she comes. Exactly the same expression.”
“Mom ... Mom, I’m gonna ... fuck, I’m gonna come...”
Mandy didn’t let up. She sucked harder, fingers pumping faster, her free hand gripping Abby’s hip to hold her in place. She wanted this. She wanted to taste her daughter’s orgasm, to feel it on her tongue, to swallow it.
Abby came with a wail that she muffled by biting her own forearm. Her pussy clenched around Mandy’s fingers in rhythmic, pulsing waves, and Mandy felt the gush of fluid flood her mouth. She drank it, moaning, her tongue lapping at her daughter through every spasm until Abby’s hand came down on her head, pushing weakly.
“Stop ... stop, I can’t ... too much...”
Mandy gave one last gentle lick and lifted her head. Her face was soaked from chin to nose, and she was smiling, and her eyes were brimming with tears.
Abby looked down at her mother between her legs and started crying too. Not sad tears. Overwhelmed tears. The kind that come when something you’ve wanted desperately finally happens and it’s better than you imagined.
“Come here,” Abby whispered, pulling at Mandy’s shoulders. Mandy crawled up and they held each other, naked and trembling, foreheads pressed together.
“I love you, Mom.”
“I love you so much, baby. So much.”
They kissed, and Abby tasted herself on her mother’s lips and moaned softly. “Can I ... can I do that to you?”
“God, yes. Please, yes.”