My gf set the rules. She wanted me to sit on the sofa and watch how she had sex with Alain.

She had met Alain in a restaurant where he worked as a waiter. She found him sexy and asked him, after chatting a bit, whether he was willing to have sex with her with her boyfriend (me) watching. He agreed and we set up a date in a motel.

I was feeling a mix of trepidation, lust, anxiety, and jealousy as G was waiting for him clad in sexy underwear and red high heels that I had bought for her. She teased me saying that these sexy items were more useful to seduce a bull and it had been more exciting to put them on to excite the sexy waiter than putting them on for me. She made a few seductive moves, which made me horny. She slapped the bulge in my pants and laughed, saying she was just practicing for Alain.

Alain arrived in tight jeans and a white shirt. My feeling of humiliation and jealousy increased - cocky, alpha-male, bodybuilder type. No wonder G had wanted him. At the same time as my sense of humiliation, my cock also grew. I was excited by the virility of Alain and eager to see him undress and take my horny girlfriend. Alain went to the bathroom, while I looked at G from my sofa.

G was eagerly waiting for Alain to come out of the bathroom. I could see she was excited. Her breasts were swollen, her nipples erect and she was wiggling her hips.

The door opened. Alain appeared naked with a self-confident smile. No wonder—he was gym-toned, muscular, and young—maybe thirty, and he sported a porn-star-like erection. His cock was thick and stiff, standing up straight at a forty-five-degree angle, which also showed off his massive, heavy balls. They really looked more like those of a bull than of a man, dangling huge and heavy between his thick thighs.

Alain displayed his hot body as he turned towards G. He had a big, strong bottom, his muscular buttocks undoubtedly trained by weightlifting as were his strong chest and biceps.

With this cock and his strong thighs and gorgeous buttocks he was a perfect sex machine. That's what G had always fantasised about. Without much ado, she unbuttoned the lingerie body (the buttons were between her legs) and spread her legs for him.

I watched as Alain knelt between her legs, caressing them, moving his hands upwards and then under her ass, grabbing both ass cheeks, which fitted perfectly into his big hands. He lifted her up like a feather.

His massive, stiff member was ready to penetrate my gf, his huge balls would soon slap her ass powered by these admirable, strong buttocks.

I noticed my penis was as hard as his, though I would only watch, while he would enjoy my gf's wet pussy, her hot body and her sexy embrace. She was oozing desire for him.

He held her spread legs up and pushed his big cock into G's open cunt. She gasped and put her arms around his neck, letting his pole slide deeply into her, and began rhythmically riding it. Alain was standing straight, his muscles easily supporting her weight, his buttocks tight, his big balls visible and moving back and forth between his thick thighs in the rhythm of G's pole dance.

My jealousy was as intense as my erection while I watched my gf enjoying, without any inhibition, this sexy male. I saw and heard her cumming on his manhood. He put her down and pumped her hard, his buttocks moving like pistons, his balls slapping her wet pussy. He came in my gf's delighted pussy.

He pulled out a few minutes later, his member still hard, glistening with the mixture of his cum and her love juices. I watched in awe as he turned G around and slid into her eager pussy from behind. This guy really was a sex machine... or maybe he had taken viagra... in any case, Alain started fucking her from behind. He was like an animal mounting his female. And his female, my gf, liked it. She moaned with pleasure as the big cock of Alain filled her pussy. It didn't take long for G to get her second orgasm. Alain accelerated and thrust his cock deeper and faster into her wet pussy and roared as he shot his second load.

G looked at me, finally, with a smile that betrayed the joy of her orgasm. She noticed my erection and said, "I'm glad you liked it! It was so wonderful."

Alain went to take a shower and after giving me a kiss she joined him. Through the milky glass, I could make out the two silhouettes in the shower, apparently soaping each other.

I was feeling jealous and humiliated, but also excited, happy that G had enjoyed Alain's company so much. My erection subsided somewhat, but I needed to get satisfaction one way or another.

Alain and G came out of the shower. I gasped when I saw Alain had another erection. G was triumphantly holding his cock in her hand and pulled him towards the bed. She called me over and said, "I want a double penetration now. You're ok? Lie down!"

I complied but protested weakly, "G, didn't you say that your ass was just for me?"

G said, "Only this once, honey," and sat down on me. I was on my back and she knelt, lowering her pussy on my stiff penis. Alain was kneeling behind her. I couldn't help glancing at his big, hard member and his huge balls admiring his virility and at the same time, thinking that it was G's sexiness that had turned Alain on.

G took my penis into her pussy and bowed down to kiss me, or rather, to present her ass to Alain. G loves anal sex and it had so far been my exclusive pleasure, but it was clear that for her first double penetration, she wanted to taste the bull's masculinity in her ass. Today, I was her cuck just for her cum-dripping pussy to have my penis filling her up, while the bull was doing the job that would give her another, more intense orgasm.

And so it was... I was passively lying under them. My cock was stimulated by the back and forth of Alain's huge member up her ass while his big balls were slapping against mine. G was screaming with pleasure as Alain fucked her ass, I felt her pussy's juices on my cock, from his stimulation, not mine, but her quivering pussy and the feeling of Alain's cock on mine through the thin wall between her ass and pussy made me cum silently and almost against my will. G probably didn't even notice as her moans corresponded to each thrust of Alain's massive cock into her ass. I felt her cumming and soon after Alain came with the proud roar of a lion. His hot sperm was running down on my balls, sealing my fate as the perfect cuck.

G murmured that she was tired and fell asleep on me, my limp penis bathed in her pussy juices and Alain's cum, while Alain took a shower, got dressed, and took his leave.