My Sister-in-Law Subdued Me While My Partner Watched

I woke to a wet, slow sensation sliding along my cock, still half asleep, still trapped between the sheets and the warmth of Mara’s body beside me. At first I thought it was her, that she’d woken up with one of those urges of hers to play before even opening her eyes. But the mouth sucking me had a different rhythm, a different way of circling me with its lips, a different way of pressing against me with its tongue beneath the head.

I opened my eyes wide and lifted my head a little. At the foot of the bed was Nerea, Mara’s sister, kneeling between my legs, her loose hair falling over her shoulders and her gaze fixed on me as she swallowed my cock with shameless composure. She didn’t pull away when she realized she’d been caught. On the contrary, she held one of my hips with one hand and lowered herself again slowly, as if she wanted me to understand that there was no mistake or confusion, that she was there because she damn well wanted to be.

“What the fuck are you doing?” I hissed, still dazed.

Nerea pulled my cock from her mouth with a wet pop and smiled.

“What I’ve wanted to do for weeks.”

I turned my head toward Mara, ready to pull away, but she was already awake. Her cheek rested on the pillow and her expression was calm, almost amused, as though she had been waiting for exactly this moment. She ran a hand over my torso and pinched my nipple between two fingers.

“Let her,” she murmured. “You’re getting hard as a beast.”

The casualness with which she said it disarmed me more than the scene itself. Nerea went back to sucking me without hurry, taking half my cock, drawing it out, licking the crown with her whole tongue before lowering herself again. I kept looking from one to the other, trying to understand when the line separating a fantasy tossed out as a joke from reality in my bed had been erased. Mara kissed my jaw.

“We’ve always shared too much,” she said. “Today it’s your turn.”

Nerea held the base of my cock and spread herself with two fingers. She positioned herself over me without asking permission, guiding me between her legs. She was wet, hot, and when the tip brushed her pussy she let out a short, hoarse moan without a trace of shame. She lowered herself slowly over the first few inches, staring straight at me, then dropped down hard until I was buried to the root. A gasp escaped her, and a growl escaped me.

“Fuck,” I said, gripping her hips on instinct.

“That’s it,” she replied. “Hold me tight.”

She began moving over me, slowly at first, feeling every full thrust, every time my cock almost slid completely out before burying itself in her pussy again. Mara sat up beside me and brushed her sister’s hair away from her neck to kiss her there, just beneath the ear. Seeing them both so comfortable, so immersed in what they were doing, aroused me with almost violent force. Nerea bounced on me while Mara stroked her as if she were preparing her for something else.

“Tell him how you like it,” Mara whispered.

“Fuck me hard,” Nerea answered, looking at me. “Don’t just lie there.”

I dug my hands into her thighs and began thrusting up from beneath her. The bed creaked at once. Her pussy squeezed me tightly, hot and slick, and each time I drove all the way inside her, her breathing fractured a little more. Mara knelt beside her and put two fingers into Nerea’s mouth for her to suck. Nerea obeyed without stopping her ride, saliva running down her chin and her breasts bouncing in front of me.

“Look at her,” Mara said. “Look at her while you fuck my sister.”

I did. And when Nerea noticed me watching her like an animal, she smiled with a mixture of challenge and arousal that stripped away the last of my modesty. I lifted her suddenly and laid her on her back across the bed. Mara gave a low laugh.

“That’s better.”

I spread Nerea’s legs wide and slammed my cock into her with one hard thrust. She cried out, not from pain but from the sheer impact, and wrapped her legs around my waist. I began fucking her for real, with long, hard strokes, without any care left in me. The wet sound of her pussy swallowing my cock filled the room along with her increasingly filthy moans.

“More,” she begged. “Don’t slow down, asshole.”

Mara settled on the pillow beside her sister’s head and kissed her on the mouth while I fucked her. They kissed sideways, tongues entwined, moaning into each other, and I watched Nerea come apart between my arms and between her sister’s lips. Mara lowered one hand to her breast, pinched her nipple, then brought it between her legs to rub her clitoris exactly where my cock opened her with every thrust.

Nerea came like that, trembling and gasping, squeezing me so tightly inside her that she almost made me come behind her. She arched, dug her heels into my back, and came spewing a string of obscenities against Mara’s mouth. I had to pull out so I wouldn’t come right then. I drew a deep breath, my cock soaked and throbbing at the level of my navel.

Mara seized my jaw and kissed me hungrily.

“You’re not going to come yet,” she told me. “We’re in charge today.”

***

We got up late, the three of us naked, dragging the morning through the apartment as if it were territory closed off from the rest of the world. Mara made coffee wrapped in a light robe, and Nerea sat on the kitchen counter wearing one of my T-shirts, no underwear, deliberately spreading her knees every time I passed close by. They didn’t talk like two women who had just crossed a line. They talked as if the line had always been erased and I was the last one to find out.

“You’re not working today, are you?” Nerea asked me.

“No.”

“Perfect. Then you belong to us all day.”

She said it with a smile, but it didn’t sound like a joke. Mara set the cup down in front of me and stroked the back of my neck.

“We’re going to play for real,” she said. “If you don’t like something, you say so. But if you keep going, you obey.”

I nodded, already half hard just from hearing her. There was something in her tone, a quiet firmness, that sent my pulse racing. Nerea jumped off the counter and went to the drawer where Mara kept some things we had used before: padded cuffs, a blindfold, a small plug, a vibrator, a black leather collar I knew well. She tossed it against my chest.

“Put it on.”

I did without taking my eyes off her. Mara came over to fasten it around my neck, leaving the metal ring right over my throat. Then she tugged it gently and led me to the living-room sofa. She sat me down with my legs spread. Nerea knelt between them and began unbuttoning my trousers.

“I want to see if you know how to stay still,” she said.

She yanked my clothes down and freed my cock, fully hard again. She wrapped her hand around it and began stroking me slowly, far too slowly, using barely the tips of her fingers, forcing me to feel every brush without giving me enough to release. Behind me, Mara passed the blindfold over my eyes and tied it firmly.

The darkness made everything more intense. I heard the movement of their feet across the floor, the click of the lubricant being opened, their breathing alternating between near and far. Nerea kept jerking me at a measured, cruel pace. Mara kissed the back of my neck.

“Don’t move,” she ordered. “If you come without permission, we’ll leave you like this, wanting.”

First I felt Nerea’s tongue on the tip, barely a lick. Then her mouth moved lower, sucking, letting me tense completely. And just when my body tried to thrust forward, Mara held my shoulders against the back of the sofa. Her hand moved down to my balls and squeezed with just enough pressure to make me snort.

“Still.”

I obeyed. Nerea sucked me better then, taking half my cock, pulling back until only the tip remained between her lips, then swallowing it again. Her saliva ran down my groin. Mara took the opportunity to spread my legs farther and slide a lubricated finger into my ass. My whole body shuddered.

“That’s how I like you,” she said. “Tense and obedient.”

Her finger withdrew and went in again, deeper. Then she added a second. My mouth hung open as I breathed through it, while Nerea sucked me hungrily and Mara prepared me from behind with perverse patience. The contrast was brutal: the hot mouth in front, the firm fingers behind, the blindfold denying me sight and forcing me to surrender to touch.

“He’s ready,” Nerea said.

I heard a metallic click and understood that Mara was adjusting a strap. She pulled the collar to tip my head back. Nerea stopped sucking me and, for a second, all I felt was the emptiness and the cold air against my wet cock. Then something hard and smooth pressed against my ass. It wasn’t thick, but it was firm enough to make me release an embarrassed moan.

“Breathe,” Mara said. “I’m putting it in slowly.”

She did. The plug entered little by little, opening me with steady pressure until it was seated properly. I felt it filling me, leaving my body alert and vulnerable. Nerea gave a quiet laugh when she heard me gasp.

“Look at him,” she said, though I couldn’t see her. “He’s already more docile.”

Mara removed the blindfold. The first thing I saw was Nerea standing in front of me, without the T-shirt, completely naked. One hand was between her legs, coating her fingers with her own wetness. The second was Mara sitting beside me with the vibrator’s remote in her hand and an expression of authority that aroused me more than any pose could have.

“On your knees,” she told me.

I lowered myself to the floor. Nerea offered me her pussy at face level, and I didn’t wait for another order. I spread her lips with my thumbs and began licking her from bottom to top, thrusting my tongue inside eagerly, feeling her thighs tense. She tasted of recent sex, of dense arousal, and the way she used my face from the very first second made me even harder.

“That’s it, asshole,” she gasped. “Get it in there.”

Mara switched on the vibrator and pressed it to her clitoris. Nerea jerked and grabbed my hair to keep me there. I ate her without gentleness, sucking, licking, pushing my tongue as far as she let me, while she came almost on top of my mouth in little spasms. Mara didn’t move the vibrator away until she saw Nerea trembling.

“Now sit down,” Mara ordered her sister.

Nerea settled onto the sofa with her legs spread. Mara took me by the collar and led me between them. She knelt behind me, slowly removed the plug, and made me exhale through my teeth. Then she masturbated me for a moment, just enough to make me hard as a stone, and guided me toward Nerea’s pussy.

“You’re going to fuck her while looking at me,” she said.

I entered in one thrust. Nerea moaned with her head thrown back, and I stayed still for a second, feeling the brutal heat of her inside. Mara held my gaze as she gave me the first slap on the ass. It wasn’t hard, but it was enough to turn me into an obedient animal. I began thrusting.

Each blow made the sofa bounce against the wall. Nerea received me with her legs spread wide, clutching her breasts, showing me her open mouth, while Mara stayed behind me, alternating caresses with slaps, orders with whispers. She grabbed my hair and pulled me backward.

“Deeper.”

I obeyed. I went all the way in, withdrew almost completely, then drove back in with a wet smack that was driving me crazy. Nerea put two fingers in her mouth, then pushed them between my lips for me to suck while I fucked her. I tasted them without breaking rhythm. Mara took my chin.

“Tell her whose cock that is right now.”

“Yours,” I growled without thinking.

They both smiled. And that small gesture, that shared approval, sent such a powerful wave of arousal through me that I had to slow down or I would come. Mara must have noticed, because she made me pull out immediately.

“Not yet.”

***

After noon we ended up in the shower, not to calm down but to keep going. Steam had fogged the glass, and the bathroom smelled of soap, hot skin, and recent sex. Nerea braced her hands against the wall, arching her back just enough to show me her ass. Mara pushed me toward her by the collar.

“Clean her with your mouth first.”

I knelt behind Nerea and kissed the insides of her thighs before bringing my tongue to her pussy. Water ran down her back and buttocks while I licked her slowly, savoring how sensitive she still was. She moaned against the tiles, moving her hips toward my mouth. Mara, beside us, masturbated while watching, her other hand gripping my hair to set the pace.

“Don’t hurry,” she said. “Make her ask for it.”

So I played with her. I licked her clitoris with only the tip, then sank deeper, sucked, alternated pressure and pauses until Nerea began trembling with frustration. She tried to turn around to find me, but Mara held her by the nape.

“You stay still too.”

The image went through me: the two sisters naked in the shower, one dominating the other, and me between them, obeying orders with my face full of her pussy. Nerea finally began begging.

“Put it in me already,” she said in a broken voice. “Please, fuck me already.”

Mara released her and gave me permission with a simple nod. I stood, grabbed Nerea by the hips, and drove my cock into her from behind. The water and soap made her entrance slippery, but the impact of going all the way in made her arch instantly. I began fucking her against the wall, hard, short, and continuously, watching her breasts tremble with every thrust.

Mara positioned herself in front of her sister and kissed her while I took her from behind. Then she lowered one hand between their bodies and began rubbing Nerea’s clitoris with two fingers. Nerea was trapped between the two sensations, moaning into Mara’s mouth, digging her fingers into the tiles, opening herself wider and wider for me.

“That’s it,” Mara said between kisses. “Let him put it all in. All of it.”

I obeyed, driving my hips with measured violence, feeling Nerea’s ass strike my pubic bone, feeling her pussy milk my cock. I lowered one hand to grab one of her breasts and squeeze it hard. With the other I kept hold of her waist so she couldn’t escape even an inch. She was no longer moaning; she was panting as if she were being emptied from the inside.

Mara moved aside slightly to watch us, then knelt in front of Nerea. She spread her legs as far as she could from below and began licking her clitoris while I penetrated her. The combination was too much. Nerea screamed—truly screamed—and came with a long spasm, squeezing my cock brutally. I kept thrusting inside her through her orgasm, feeling her contractions one after another, until I could barely hold myself up.

I pulled out before coming, and Mara grabbed my cock at once.

“Come here.”

She turned me toward her and made me sit on the edge of the tub. She knelt between my legs and sucked me with a hunger different from her sister’s: more possessive, more conscious of what she had been denying me for hours. She swallowed me to the root, then looked at me while she spat on me and continued stroking me with her mouth open near the head.

“Don’t come,” she warned, almost laughing at my expression.

It was torture. Nerea, still trembling from her orgasm, knelt behind Mara and began kissing her back, neck, and shoulders. Then she brushed her hair aside and bit the nape of her neck while Mara continued sucking me. They touched each other, rubbed against each other, provoked each other, and I was in the middle, on the verge of losing my mind.

Mara finally released my cock and stood.

“To the bedroom. I want to finish this properly.”

***

The late-afternoon light slanted through the curtains when we returned to the bed. Fatigue was beginning to show in our bodies, but not in our desire. On the contrary: after so many hours of arousal, denial, and being used, everything was more sensitive, more urgent, more animal. Mara took out a pair of padded cuffs and showed them to me.

“Final part,” she said. “If you keep going, you know the rules.”

“I’m continuing.”

She cuffed my wrists to the headboard, not so far apart that it hurt but far enough for me to feel my lack of control. Nerea climbed onto the bed and spread my legs. Mara straddled my face, allowing me to glimpse her sister’s pussy approaching my cock. I understood the game all at once and nearly lost my breath.

“You’re going to serve both of us,” Mara said.

She sat on my mouth and I began licking her on instinct. Her pussy was hot, swollen, and she knew exactly how to use my tongue. She moved over me, guiding the pressure, forcing me over her clitoris, in and out, making me swallow her moans. At the same time, Nerea slowly impaled herself on my cock, looking down to enjoy my expression trapped between her sister’s legs.

The sensation drove me out of my mind. My mouth was occupied with Mara, my cock buried in and sliding out of Nerea’s pussy, my arms immobilized, my entire body reduced to serving them pleasure. Nerea began riding me at a steady pace, bracing her hands on my chest. Mara came first, crushing my face between her thighs and releasing a long moan that vibrated straight across my tongue.

When she moved away, I drew a deep breath for barely a second before she seized my jaw from the side.

“Now look at her,” she ordered.

Nerea kept riding me, faster and faster, her hair stuck to her neck and her breasts rising and falling out of control. My cock was burning hot, stretched to its limit, and it showed on my face. Mara leaned in to kiss me, then whispered in my ear:

“You’re going to come when I say so. Not a second before.”

Nerea began rubbing her clitoris while she rode me. I watched her lose the rhythm, find it again, lose it once more, reaching that exact point where pleasure becomes almost rage. Mara put two fingers in her mouth for her to suck, then brought them between her legs to help her come. Nerea burst over me, trembling on her knees, squeezing my cock with savage contractions.

“Now,” Mara finally said.

The order broke me. I came with a dry groan, clinging uselessly to the headboard, emptying myself inside Nerea in long pulses that drained me completely. She kept moving for a little longer, milking me of the last drop, then collapsed to one side, panting. Mara released my cuffs and kissed me with an almost tender calm that contrasted with everything they had done to me.

The three of us lay sprawled on the bed, sweaty and exhausted, our breathing still uneven. Nerea had one leg over my thigh. Mara rested her head on my shoulder.

“Not bad for an ordinary morning,” she said.

I laughed, still recovering.

“It was morning when it started. Now I don’t even know what time it is.”

Nerea lifted her head and smiled shamelessly.

“Even better. That way tomorrow we can start again without looking at the clock.”

No one answered right away. There was no need. After the way they had used me, after putting me on my knees and leading me from one to the other all day long, the promise hung in the air like something perfectly possible.

And the worst—or the best—part was realizing that I was already longing to obey again.