The Family Hot Tub
by Oldnfashioned
Copyright© 2026 by Oldnfashioned
Incest Sex Story: The hot tub was meant for two, but the night had other plans. When Michelle catches her teenage children crossing the line in the steam, she doesn’t wake the house. She watches. And she wants in. Alongside her husband Rick, the boundaries between parent and lover dissolve in the bubbling heat. No scolding. No stopping. Just a quiet slide into the water and a silent consent. A wet, unrepentant dive into voyeurism and taboo swapping.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa mt/ft Ma/ft mt/Fa Consensual Reluctant Heterosexual Fiction Sharing Slut Wife Wife Watching Incest Mother Son Brother Sister Father Daughter Group Sex Exhibitionism Masturbation Voyeurism Big Breasts .
The house is finally quiet. I lean against the cold granite of the kitchen counter, waiting. The digital clock on the oven reads 11:47 PM. I’m wide awake, hypersensitive to the hum of the refrigerator and the faint settling of the floorboards overhead.
Rick walks up behind me. He presses his chest against my back.
“They’re finally out.”
I lean back into him. I can feel him getting hard against my ass, his hands heavy and possessive on my wide hips. “They” were our kids- Emma, our sixteen year old daughter and Connor, our seventeen year old son. Emma’s light went out under her door an hour ago. Connor was just down the hall from her. I saw his light go out twenty minutes later.
This is the part we’ve been waiting for. The silence.
Rick reaches past me and unlocks the back door. The mechanism clicks, loud in the quiet kitchen. We step out into the night air. It’s cool on my skin, a sharp contrast to the warmth inside. The deck boards feel rough under my bare feet. I can see the hot tub bubbling in the corner of the yard, the underwater lighting turning the steam into a pale, rising mist. It looks inviting.
The fence is high and the neighbors’ second-floor windows are dark. If they looked, they’d see us. The thought makes my skin prickle. I like it.
Rick pulls his shirt over his head. I watch him. He’s got that broad back I’ve always liked, his muscles shifting under skin I know well. He drops his shorts, and I look down. He’s ready. Seeing him like that, right out in the open air, makes me wet.
I undo the tie of my robe and let it drop to the deck. The night air hits my heavy breasts and stomach, making my nipples harden instantly. The ache between my legs is already a steady throb. Rick looks me over, his eyes dark and hungry, stopping on the curve of my waist.
“Get in. Before you freeze.”
I step into the water. It’s a shock, not the temperature, which is perfect, but the sensation of the heat claiming me. The water takes my weight, making me buoyant. I sink down to my chin. The jets are already running, churning against my lower back, bubbles sliding over my thighs. Rick gets in right after me. The water level rises, sloshing over the side like it’s too full.
He doesn’t stay on his side. He moves right into my space, his knee pushing between mine, his leg hair scraping the inside of my soft thigh.
“Private enough?” His breath is hot against my temple.
I glance at the dark silhouette of the house. “I don’t care who sees.”
He pulls me onto his lap. The fiberglass seat is slippery. I can feel the heat of his cock pressing against my stomach, thick and heavy. He kisses me, tasting like the whiskey we had after dinner. Messy. Eager. I wrap my legs around his waist, positioning myself. He runs his hands over my hips, squeezing the flesh there.
He guides himself in. It’s a smooth, heavy slide, my pussy wet enough to accept him easily. I gasp as he fills me up. It feels different out here, exposed to the night. He grips my waist, fingers digging in, lifting me slightly and then pulling me back down. He sets a rhythm.
“You feel amazing, baby. Now fuck me like a good girl.” I say into his neck.
I hold onto his shoulders, my nails digging in. The water splashes over the edge with our movement, dripping down the sides of the tub. I can’t help thinking about the kids inside. Emma’s window faces the deck. Connor’s room does too. If one of them got up for water, if one of them looked out...
I let out a moan, louder than I intended. Rick puts his hand over my mouth, stifling it. He reads my thoughts. He moves his other hand to touch me between my legs, rubbing my clit while he thrusts up into me. It pushes me right to the edge.
“Quiet. Unless you want an audience.”
“Let them look.”
The words feel filthy. The idea hits me hard. I think of Connor walking onto the deck, seeing us, seeing his mother getting fucked in the backyard. The though makes my insides clench tight around Rick.
“You like that idea, don’t you? Our kids watching us fuck?” He thrusts harder. I nod. Breathless. “You’re such a slut, Michelle.”
That word tips me over. Slut. I want to be his slut tonight.
I cum hard. I grind down against him, my head falling back in a silent scream. He keeps going. “Use me. Own your slut.” I whisper. He drives into me until he hits his limit. He groans and pulses inside me. We stay like that for a minute, the steam rising around us like a curtain, the jets still bubbling away between our bodies.
My breathing is ragged. I can feel the twitch of him softening inside me. The water laps against my chest.
“I love you.” He presses a wet kiss to my shoulder.
“I love you too.” I run my hand down his arm, feeling drained. Heavy. “This hot tub is the best purchase we ever made.”
We laugh quietly, the sound drifting up toward the dark windows.
----- The house is dead quiet. It’s the heavy silence of deep night, broke only by the hum of the air conditioning. I wake up with a dry throat, sliding out from under Rick’s arm without waking him. The floorboards are cold under my bare feet as I navigate the hallway in the dark. I don’t check the kids’ rooms. I just head straight for the kitchen.
I don’t turn on the overhead lights. The only light comes from the refrigerator door as I fill my glass. The water dispenser gurgles, loud in the stillness. I drink it down in one go, the water cold and clean. I press the condensation-slick glass against my forehead to cool down.
That’s when I see the glow in the backyard.
It isn’t the security floodlights. It’s softer, warmer. The hot tub is on. The surface of the water is moving, catching the underwater lights and sending shadows dancing across the steam rising into the night air. I know we turned it off earlier.
I set the water glass down on the granite island. The stone feels freezing under my palms. I lean forward, putting my face close to the darker glass of the patio door. My breath fogs it up, and I wipe a clear circle with the side of my hand.
The tub isn’t empty.
Two shapes are moving in the steam, dark silhouettes against the churning white water. I hear a laugh, muffled by the glass but definitely female. My first thought is annoyance. Connor must have sneaked a girl over. I frown, feeling a flash of territorial irritation, and look closer.
The girl has her arms around his neck, her legs straddling his lap under the water. They make out like teenagers do. All hormones and friction. I watch his hands grip her waist. It makes me think of his father. Maybe it was hereditary.
Then the girl twists. Her back arches, and the underwater light catches the wet sheen of her skin and the curve of her jaw.
It isn’t a stranger. It’s Emma.
My daughter. With my son. The distinction hits me hard, but instead of horror, I feel a sudden, sharp spike in my pulse. My body reacts before my brain does. Connor’s hands slide up from her waist to her ribs. His thumbs brush the undersides of her breasts, pushing the bikini top up. Emma lets her head fall back.
They are doing a lot more than kissing.
Emma’s hips roll against him, slow and grinding. The water sloshes around them. Connor is wearing his dark swim trunks, but the fabric clings tight to his thighs. I can see the outline between his legs. He is hard. Thick and heavy. And Emma is grinding right down against that hardness.
I don’t turn around. I don’t knock on the glass.
The steam swirls and parts. I watch Connor’s hand slip beneath the fabric of her bikini top. His fingers disappear under the cup. Emma arches closer, her fingernails raking down his chest. I see the exact moment he pinches her nipple. Her body jerks. My own nipples tighten instantly against my nightgown, the friction sudden and abrasive.
My daughter is dry humping my son.
Thinking about it acts like fuel. Acknowledging the taboo makes the pleasure sharper. My face feels hot.
Connor’s other hand slides down between them. His fingers disappear beneath the waistband of Emma’s bottoms. Her thighs fall open wider to let him in. She lifts her hips, offering herself to his hand. I can’t see but I know exactly what he’s doing. I can imagine the slick heat of her. I can imagine his fingers parting her, finding the spot that makes her shake.
I press my thighs together. The seam of my panties feels tight, digging into me. I shift my weight, the cotton dragging against skin that is already damp. I’m hungry for it. The counter edge digs into my hips as I lean closer to the glass.
Emma’s head snaps forward. Her mouth crashes onto Connor’s. The kiss looks dirty, aggressive. I can see the push and pull of their mouths, their tongues darting in and out hungrily. Her hips are rolling in sharp, desperate circles now. Connor groans. I can’t hear it but I can see the pleasure on his face. My fingers twitch against the cold granite.
I slide my hand down my stomach. My nightgown rides up as my fingers slip beneath the elastic of my panties. I am already wet. Soaking wet. The first touch makes me bite my lip. My breath hitches in the silent kitchen. I lean my forehead against the window. The glass is cold against my forehead, but my skin feels on fire.
Out in the tub, Connor’s free hand grips Emma’s hip. He lifts her, just enough to adjust himself. I see the head of his cock peek above the waistband of his trunks, dark and glistening in the mood lighting. Emma’s hand wraps around him. I see her thumb swipe over the tip. Oh god.
My hand moves faster between my legs, circling my clit in tight, rhythmic loops.
Emma strokes him. Once, twice. Then she guides him to her crotch. She’s still in her bottoms as she sinks down. The water obscures them but I imagine his tip pushing against the fabric of the bikini. It’s the only thing stopping him from entering her. I imagine the friction. My fingers stutter. My body coils tight.
Connor’s hands grip Emma’s ass. Her cheeks look perfect in the thong of the suit. She rocks forward, pressing her forehead against his. They aren’t fucking. Not fully. Not yet. But they are close. The way Emma’s hips roll, the way Connor’s thrusts up for a second before she pulls back. Watching them edge each other pushes me over.
I bite down hard on my knuckle to stay quiet.
I cum hard. My hips jerk against my hand as the pleasure breaks. My vision blurs. My thighs lock tight, then melt. My knees feel weak.
When I can focus again, Emma is riding his leg, grinding in earnest. Her bikini top is floating in the water beside them, ignored. Her breasts bounce with every snap of her hips. Connor’s head is thrown back, his throat muscles working, his hands gripping her waist like he owns her. Her hands are under the water somewhere. From her movements I can tell she is jerking him off.
I step back from the window.
The glass is smeared where my forehead were resting. My breath is still coming too fast. My body is humming with the aftershocks. I grab my water glass from the counter. My hand is trembling.
I walk back into the shadows of the hallway. The house is silent.
I get back into bed. Rick doesn’t move when I slide under the covers. His body heat seeps into my skin, but it isn’t enough. Not after seeing that. I press my legs together. The ache is still there, throbbing faintly. I lie there in the dark, staring at the ceiling.
I will be back at that window tomorrow night. I want more.
I reach down again into my panties to feed the flame.
----- Rick pulls his shirt over his head and tosses it toward the hamper. I’m leaning against the dresser, watching the muscles in his back shift. I haven’t been able to focus all day. The image of Connor and Emma’s wet skin slapping together is stuck on a loop in my head.
Rick turns. He catches me staring. He stops, his hands resting on his hips.
“You’ve been weird all day.”
He steps closer. He smells like shower soap and the faint, metallic scent of his deodorant. He puts a hand on my forehead, checking for a fever. The familiar weight of his palm makes my stomach flip.
“I’m not sick.” I push into his hand. “I’m just ... I don’t know what I am.”
He smirks, his thumb brushing my cheek. “Yeah?”
“I saw something I shouldn’t have.”
Rick stops moving. His thumb freezes on my skin. “What do you mean?”
“I saw ... them.”
“Them who?”
“Connor and Emma. Last night.”
The air leaves the room. Rick’s face goes blank, the indulgent husband expression vanishing. “What are you talking about?”
“I went down for water. They were in the hot tub.” I step closer to him, closing the gap. I put my hand on his chest, feeling his heart rate pick up. “They didn’t see me. The lights were on underwater.
“OK so they went out for a dip. So what?”
“No, Rick! Emma was ... straddling him.”
Rick steps back in shock. “Michelle, I’m sure it was just late and dark.”
I shake my head. “She was topless, Rick. She was sitting right on his lap and ... she was grinding on him.”
He stares at me. I can see the “dad” instinct warring with something else—shock, maybe, or just the raw graphic nature of the words. I don’t give him time to be angry. I lean in and whisper right against his ear.
“They were making out. She was dry humping him. And he was sucking her tits. And then she jerked him off.”
Rick’s breath hitches. His hands reach out, sliding up my arms, pulling me in. I can feel him hardening against my stomach. The anger is gone. The visuals are working on him.
“You watched them?”
“I couldn’t look away.” I run my hand down his chest, over the waistband of his boxers. He is fully hard now, twitching against the fabric. “Emma’s tits were just out. Wet. She looked so good, Rick. She was throwing her head back, letting him take her.”
He groans. He spins me around, shoving me against the dresser. The wood edge digs into my lower back. He presses his full weight against me, caging me in.
“Did it turn you on? Watching our son with our daughter?”
“Yes.”
He kisses me. It’s bruising, hungry. He forces my mouth open, his tongue sweeping inside. His hands are everywhere—squeezing my ass, gripping my waist, bunching my skirt up to my hips. He doesn’t wait. He shoves his hand into my panties. I’m already soaking wet.
“Fuck, you’re slippery.”
“I’ve been thinking about it all day.” I spread my legs wider, letting him touch me.
He pulls my panties down, his fingers rough against my sensitive skin. He finds me, rubbing hard circles that make my knees buckle.
“Tell me what else.”
“Connor had his hands all over her.” I gasp as he slips two fingers inside me. “He was gripping her ass. Spreading her cheeks.”
Rick withdraws his fingers and pushes into me. One stroke. Deep. I cry out, digging my nails into his shoulders. He fills me up completely.
“Did you want to join them?” He says, his hips driving into me again.
“Yes.”
“You wanted him to touch you?”
“Yes!”
The word hangs there. Filthy. True. Rick freezes for a second, his eyes wide. Then he starts fucking me in earnest. Fast, punishing strokes. The dresser creaks against the wall.
“Where would you let him touch you?”
“Everywhere.” My head falls back. “I’d let him put his hands on my tits. On my ass. On my pussy.”
“While I watched?”
“Yes. God, yes.”
“While Emma watched?”
“Yes and...” I moan, the mental picture becoming too much. “I want her to touch you like that too.”
Rick growls. He grabs my hair, pulling my head back to meet his eyes. “You want to see our daughter grind on me? Jerk me off?”
“YES! I know. It’s wrong. Our kids. But ... oh God Rick oh God...” I can’t finish. I feel my orgasm building. I can tell his is too.
He slams into me, hitting the deepest spot. We find a rhythm, frantic and sweaty. I’m not thinking about work or the mortgage. I’m picturing the four of us in the water. I’m picturing Connor’s cock where Rick’s is now.
I cum hard. My body clamps down around him, spasms rocking through me. Rick follows me seconds later, groaning against my neck, pouring himself inside me.
We collapse against the dresser, breathing heavy. The room is quiet again, but the energy has shifted. It’s breathless. Charged.
Rick keeps his arm around my waist as we straighten up. He pushes a strand of hair out of my face. He doesn’t look angry.
“We should say something to them, shouldn’t we?,” he says. But his voice has no bite.
“No.” I kiss his chest. “I don’t want to stop them.”
He runs his hand down my back, resting it on my ass. “No. I don’t either.”
“Next time I hear them,” I whisper, “I’m waking you up.”
Rick looks me in the eye. He grins, dark and complicit. “You better.”
----- The kitchen lights are off. We are standing by the sliding glass door, Rick and I, like we’re hunting.
Through the glass, the backyard is a mix of shadow and blue artificial light. Steam rolls off the hot tub in thick clouds. I can’t see them clearly, just shapes merging and separating in the water, but I know they’re there.
Rick reaches for the door handle. He looks at me. He’s holding two tumblers of whiskey in one hand, the bottle in the other. He looks ready.
“Let’s go.”
He slides the door open. The track rumbles, a grinding sound that cuts through the night.
The reaction in the tub is instant. A violent splash. Bodies scrambling. Connor launches himself away from Emma, crashing against the far wall. Emma sinks low, the water lapping at her chin, knees pulled up to her chest to hide her body.
“Shit!” Connor’s voice cracks. “We—we were just—”
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