I Proposed a Stranger to My Girlfriend and She Agreed That Night

Gràcia’s shared apartment smelled of reheated pizza and the cheap fabric softener from the washing machine we’d run when we got back from university. It was eleven twenty on a Thursday at the end of March and, outside, Barcelona kept making noise: laughter drifting down toward Plaça del Sol, a motorbike climbing Verdi, a distant siren over the Eixample. Inside, all you could hear was the hum of the fridge and the pulse pounding in my ears.

Lucía was stretched out against my chest, wearing one of my old T-shirts and white cotton panties. We’d been together for two years, both of us twenty-two, both studying Tourism at the University of Barcelona. The sex was good but routine: twenty minutes in the narrow bed in the flat, sometimes her on top on hungover Saturdays. Nothing out of the ordinary.

I’d been choking on that fantasy for months. That night, after the last episode, I took a deep breath and blurted it out:

—Lucía… I want to see you fuck another guy.

She blinked twice, as if she wasn’t sure she’d heard me right. She sat up and the T-shirt rode up to her waist. Her cheeks were red and her green eyes wide open.

—How?

—Another guy. Bigger than me. Tied you up, do whatever he wants to you. Me hidden away, watching on cameras. Without him even knowing you’ve got a boyfriend.

The silence lasted almost half a minute. Lucía bit her lower lip and ran a hand through her light brown hair.

—Fuck, Mateo… —she murmured—. Those videos you delete from your history when you think I’m not noticing?

—Yeah. It started as curiosity and now I can’t come thinking about anything else. Just once. If you don’t like it, we never talk about it again.

She went quiet, looking down at her hands. They were trembling a little. Her nipples showed through the thin T-shirt and she was breathing faster. When she lifted her face, she smiled. A small, scared, real smile.

—Okay. Once.

I grabbed her phone from the nightstand, sat against the headboard, and opened Tinder. I would write for her. She picked three photos: one in a bikini at Barceloneta with her face covered, another in black lingerie, and one from behind that showed her round ass under a pair of jeans. In the bio I put, imitating the way she talked: “22. University student in Barcelona. Looking for an intense night, no strings attached (or with them, hehe). I’m into bondage. Tall, strong guys with big dicks. Always a condom. If you can’t respect that, don’t even message me.”

We started swiping. Shitty guys, worse gym selfies. Until he appeared. Kwame. Twenty-four, Erasmus student from Ghana, basketball player for the university team. Almost six-five, shirtless in a gym, white calm smile. In the third photo, no face: his cock hanging heavy over his thigh, thick as a wrist.

Lucía let out a barely audible “fuck” and squeezed her thighs together without realizing it. I felt a hot stab of jealousy and excitement at the same time.

—That’s him —I said, my voice breaking—. This is the one who’s going to fuck you.

The match came in less than a minute. By a quarter to two in the morning, the date was locked in. Saturday, ten at night, at our place. I repeated the condom part four times. Kwame kept answering yes, princess, don’t worry, I always carry them.

Lucía left the phone on the nightstand, pulled her T-shirt off over her head, and climbed on top of me. She sank down on my cock in one slow, deep motion.

—Fuck me now —she whispered, eyes closed—. Because on Saturday it’s going to be someone else fucking me for real.

***

On Saturday I spent the whole afternoon setting the scene. I ordered four small spy cameras online, with night vision and Wi-Fi connection, and they arrived by noon. I taped them into place: one on the headboard aimed at the center of the mattress, another on the ceiling for the overhead view, and two on the nightstands for the side angles. I tested the phone app. All four images looked brutally sharp, even with the lights low.

In a discreet shop in the Raval I’d bought the rest: four black leather handcuffs padded with Velcro, a roll of red silk rope, a satin blindfold, and a ball gag we didn’t know if we’d use. Also a pack of extra-large condoms and a small bottle of lube. I laid everything out on the living room table like a battle plan.

Lucía was sitting on the sofa biting her nails. She was wearing sports shorts and a tank top that showed her nipples pressing through the fabric.

—Mateo… —she said softly—. I’m fucking terrified. What if it hurts? What if he’s too big?

I hugged her from behind. She was trembling a little.

—Safe word: red. You say it and everything stops. I’ll be next door, with headphones on. He won’t hear anything weird. He thinks you’re a single girl looking for a wild night.

She turned in my arms and kissed me. When she pulled back, her green eyes were shining.

—I want to feel it for real —she said almost voicelessly—. That’s why I said yes.

I put her in the shower. I soaped her up slowly, all over, as if it were the last time I’d ever see her only for myself. I ran the sponge between her legs, feeling her shiver whenever I brushed her clit. I dried her with a big towel and sprayed perfume on her neck, between her breasts, on the inner sides of her thighs. Then I laid her naked on the bed, still with two hours to go.

—Kiss me —she asked.

I fucked her slowly. She was soaked. As I drove into her with long strokes, she dug her nails into my back.

—I want you to watch it run inside me —she whispered—. I want you to record it.

I came sooner than I wanted. It didn’t matter. Tonight wasn’t my turn.

***

At nine forty-five I tied her up. Lucía was completely naked in the middle of the bed. The red light from the bedside lamp, a bulb I’d put in to set the mood, bathed her light brown skin. I cuffed her right wrist first to the top post, then the left. The Velcro made a dry sound. I moved to her ankles, spreading her legs as far as they would go. She ended up in a perfect X: arms and legs open as wide as possible, pussy completely exposed.

—You’re gorgeous like this —I murmured, adjusting the satin blindfold over her eyes. The world went black for her—. Now you’re only going to feel. His hands. His cock. His mouth. Everything.

—Mateo… —she whispered—. Look at my pussy. It’s dripping.

It was true. A shiny trail was running down her thigh. I ran two fingers through her lips and sucked them myself, even though she couldn’t see it. I kissed her deeply. I picked up the ball gag and left it on the nightstand, within reach.

—This is in case you want it later. For now, no. I want to hear you moan when he fucks you.

I turned off the main light, closed the door carefully, and went into the small study next door. The laptop was already on, with the four windows open. There she was: tied up, blindfolded, naked, waiting. I pulled down my boxers and grabbed my cock with my right hand.

At ten oh two, the doorbell rang.

***

I jumped so hard I nearly knocked the laptop over. On the screen, Lucía instinctively pulled against the cuffs when she heard the bell. Her wrists and ankles tightened against the posts, but she didn’t move an inch.

—The door’s open! Come in! —she shouted from the bedroom, exactly as we’d rehearsed.

Through the hallway camera, a fifth one I’d installed that afternoon, I saw the front door open slowly. Kwame was even more imposing in person. Tight black T-shirt, dark jeans, spotless white sneakers. Shoulders that filled the frame. Skin of a deep black, almost ebony. He smelled of a citrus cologne that reached even where I was hiding. In his hand, a small gym bag.

—Lucía? —he called in a deep voice, with a soft accent that raised the hairs on my skin.

He followed the sound to the bedroom door. Pushed it open. And froze in place.

—Fuck… —he murmured, breathless.

The image in front of him was exactly what I had dreamed of and feared at the same time. Lucía spread open in a cross on the bed, red light over her skin, her small tits rising and falling quickly, her shaved pussy already glistening.

He dropped the bag on the floor without taking his eyes off her.

—You’re even prettier than in the photos —he said, sitting on the edge of the mattress. His huge hand moved up Lucía’s calf, over the inside of her thigh, stopping a few centimeters from her open pussy—. Are you sure about this, princess? Because once I start…

—Yes —she answered, her voice trembling but clear—. I want you to use me.

Kwame pulled his T-shirt off in one motion. His black, muscular torso shone under the red light. He yanked down his jeans and boxers. His cock sprang free. It was exactly like in the photo, but in person it looked even more intimidating: ten inches of thick, veined, semi-hard flesh, swinging heavy between his legs. I let out the breath I hadn’t realized I’d been holding. My own cock throbbed in my hand without me moving it.

***

He started with her mouth. His broad, hot tongue ran from Lucía’s ass to her clit in one slow, deep lick. She gave a choked cry and yanked hard against the cuffs.

—You’re dripping into my mouth —he growled between licks, sliding two fingers inside her at the same time—. I love how you taste.

I switched frantically between the cameras. The overhead shot showed his shaved head buried between my girlfriend’s legs. The side angle showed his black fingers going in and out, glossy. The front camera showed her face under the blindfold, mouth parted, little sobs of pleasure escaping. I felt jealousy, rage, love, and an excitement so strong my hand was shaking.

He lifted his head, his chin shiny.

—Do you want me to fuck you now?

—Please… I want to feel you inside me.

He rose onto his knees. His cock was now fully hard, thick, pointing against his defined abdomen. He grabbed the bag, took out an extra-large condom, and cracked the wrapper. I felt a stab of relief. Good. He’s going to use it.

But he only rubbed the tip of the condom against Lucía’s clit. Then he let it drop open on the nightstand.

—You’re too wet —he growled—. I can’t fuck you with rubber. I need to feel you for real.

Lucía tensed instantly.

—Wait… the condom… —she protested, her voice trembling, pulling against the cuffs—. You said you always…

He didn’t let her finish. He put one hand on her hip and, with the other, guided his cock to the entrance of her pussy. The wide head pressed against her swollen lips.

—Easy, princess. I’m going slow. But I’m going to fuck you skin to skin.

And he pushed.

The head went in centimeter by centimeter. Lucía let out a long, sharp moan. My throat closed up. He’s fucking her raw. He lied to her. And she won’t stop moaning. Jealousy rose in me like bile, but my cock was throbbing harder than ever.

With one last shove, all ten inches disappeared inside her. His heavy balls pressed against Lucía’s ass. He held still, letting her feel every vein.

—You’re completely full —he growled—. Do you feel it?

—Yes… I feel all of it…

***

He started moving slowly, long pulls out and deep thrusts back in. The wet, fleshly sound filled the room. Lucía moaned louder and louder, her wrists tugging at the cuffs and her ankles straining.

After a few minutes he changed the rhythm. No more slow pushes. They became deep, fast, savage blows. The bed started creaking against the wall. His heavy balls slapped against her ass with a dry, steady sound.

—It’s too big! —Lucía gasped, shouting nonstop.

He didn’t stop. He turned her on her side without pulling out, lifting one leg, and fucked her at a new angle that hit her G-spot directly. Lucía exploded in a brutal orgasm with a torn cry that echoed through the whole flat.

—I’m coming! I’m comingggg!

A gush of squirt shot out, soaking the sheets and his dark thighs. He didn’t stop for a second. He kept fucking her through the orgasm, even harder. The second one came two minutes later, more intense, with Lucía’s voice breaking. He lifted her off the mattress by the hips, impaling her in midair while she was still tied up, and fucked her standing up as if she weighed nothing. Those ten inches went in and out completely with every movement.

—Tell me you like it more than Spanish cock —he demanded, panting.

—Yes! I like it more! You’re tearing me apart!

I, in the other room, was on the very edge of coming. My hand was soaked. Watching my girlfriend come like that on a cock that wasn’t mine was too much. Jealousy burned my chest, but the pleasure was even stronger. I couldn’t stop looking.

***

When he growled that he was about to come, Lucía tensed. Even with the blindfold on, her face showed panic.

—No! The condom! Put the condom on, please! —she begged—. You said you were going to use it!

He didn’t slow down. He sped up. The thrusts became short, deep, violent.

—I can’t stop now… your pussy is begging for it. You’re squeezing me too hard.

I felt like the world was collapsing on me. We said always a condom. I insisted. She insisted. And now he’s fucking her raw. He’s going to come inside her. Tears of rage and excitement stung my eyes. I felt small, insignificant, pathetic, and at the same time more alive than I’d ever felt.

—Put the condom on… please… —Lucía begged again, but her voice no longer sounded convincing. It sounded broken by pleasure.

He roared and pushed with all his strength. His whole body tensed. The first rope of semen shot straight into the back of Lucía. Then another. And another. Powerful, abundant spurts.

Lucía exploded in a brutal orgasm as she felt it, with a long, ragged scream:

—He’s filling me! God, he’s coming inside me!

Her pussy clenched hard, milking him. A jet of squirt shot out around the black cock, mixing with the semen that was already beginning to overflow and drip down her ass.

He stayed buried to the hilt, not pulling out. His cock kept throbbing, sealing everything inside. He leaned down and kissed her hard on the mouth.

—Now you’re really mine —he whispered against her lips—. Even if your boyfriend doesn’t know a thing.

I, with my heart in pieces, didn’t blink.

***

Kwame dressed in silence, left a kiss on her forehead, and went out. The apartment door shut at twelve thirty. I waited exactly three minutes. I went into the bedroom barefoot. Lucía was still tied in a cross, sweaty, exhausted. Kwame’s semen was slowly dripping out of her, thick, forming a white pool between her ass cheeks and the sheets.

I picked up the gag from the nightstand and buckled it tightly behind her head. The red silicone ball filled her mouth completely. Her green eyes went wide when I removed the blindfold.

I felt like my chest was about to split open. He came inside her. He filled her pussy to overflowing. No condom. My Lucía. And she asked for more. She said she liked his cock more.

—Now it’s my turn —I said in a voice that didn’t sound like mine—. I’m going to fuck you like the slut you are.

I pulled off my T-shirt and boxers. My cock, harder than ever, throbbed. I climbed between her open legs. I took my own cock and rubbed the head against her vaginal lips, gathering the other man’s semen. I used it as lube. I smeared it all over my cock. The smell of someone else’s sex filled my nose.

—This is what you wanted, right? Then now I’m going to fuck you with his load still inside.

I drove in with a brutal thrust all the way to the hilt. Kwame’s semen made an obscene sound as my cock displaced it. Lucía gave a muffled cry against the gag. I started fucking her with rage, no foreplay, no mercy. Every thrust forced more of the other man’s semen out around my cock, splashing my balls.

—Feel me fucking you with his cum inside —I gasped—. Do you feel how I’ve claimed you?

Lucía moaned into the gag, drooling from the corners of her mouth. I grabbed her hips, digging in my fingers, and impaled her even deeper, as if I wanted to erase every trace of Kwame. Jealousy clouded my vision. I imagined her begging for more, imagined her screaming that she liked that cock better. And that only made me fuck her harder.

—You’re mine —I growled, biting her neck until I left a red mark—. Mine. Even if another man filled you up.

I fucked her out of control for several minutes. I pulled her hair, pinched her nipples, switched between short and long strokes. Finally I felt I couldn’t hold back anymore.

—I’m going to come inside you too. Mixing my semen with his. So you know who you really belong to.

With one last savage thrust, I came. Hot ropes shot into her, mixing with Kwame’s still-warm semen. Lucía had a final convulsing orgasm around me, her eyes rolling back for a second and a muffled moan caught against the gag.

I stayed over her for a few seconds, panting, sweating. I carefully unbuckled the gag. She coughed a little.

—Mateo… —she whispered, her voice broken.

I kissed her forehead, still inside her.

—I love you —I said, and my voice shook—. More than ever. But this has only just begun.

I untied the cuffs one by one, gently, and held her tight against my chest. Lucía curled up in my arms, still dripping both men’s semen, trembling.

The flat in Gràcia was silent. But inside me, everything was roaring.