Caught my girlfriend fucking my housemate and I used her like a toy after

So last night I come home early. I live in an apartment with my best friend of 10 years, and my current girlfriend of just over a year last month. It's been a good arrangement, we all get along, hanging out most nights just for a bit to talk.

Since Molly, my girlfriend, met Ben, the housemate, she has clearly found him attractive. When she heard he'd done OF content with an ex girlfriend, she probed around to try and find it; which she did.

Now I'll admit, I've thought about it before. Fantasised to the idea of them fucking, or just Molly being fucked by other guys in general. We fuck a few times a week, but I still like the idea.

So I get home early from my trip out, and the apartment is kinda quiet. Normally Molly is sat on the balcony, or on the couch watching TV. Ben is often at his PC playing games, or sat beside Molly and using her bong. Molly has also started sitting around to watch me play games or Ben when I'm not playing something exciting.

So when I didn't see Molly, and I just assumed they were asleep or hanging out with Ben. I go to my room, Molly isn't there. I check the bathroom, not there either. Ben's bedroom door is closed, he doesn't normally do that.

My heart raced a little, I crept up to the door, and leaned my ear near it. It was quiet, some show playing on the TV muffled by the door. I waited, and heard a bedframe squeak.

Then a moan. Molly's moan. Then I heard skin on skin sounds, a slow rhythm. Molly moaned sharp with each smack. She said something I couldn't hear, and the pace quickened.

My heart was racing, I was sweating, and I was desperate to see more. So I walked to the balcony, gently opening the sliding doors, and shuffled my feet to the adjoining door to the balcony from Ben's room. I peeked, and his curtain was shifted open enough that I could see him standing at the edge of the bed.

Molly on her knees, ass up. Ben was railing her. And in the mirror behind them, I could see Molly gripping the sheets and pushing back against him. Ben spanked her, she gasped, moaned, and begged for more.

From the balcony I watched. He fucked her, slow and long thrusts. Spanking her ass red. Reaching over to pull her hair and make her moan loud enough that I wouldn't have mistaken it for anything else.

She started to beg.

"Fuck me. Fuck me. Cum inside me. Fucking do it. Fuck."

Hard thrusts that rocked the bedframe into the wall, knocking repeatedly. Then Ben groaned, fingers gripping Molly's soft waist, he pushed in, and came inside her. He pulled out a second later, both of them flopping to the side.

I crept back inside, I hadn't emptied my pockets, so I went out the front door and did my best to gently shut it. I went to the front of the apartment block and waited a few minutes.

I didn't know what I wanted to do. Part of my was upset they went behind my back. Part of me wanted to throw Molly down and use her. So after maybe 10-15 minutes of scrolling, I got up and made my way back inside.

This time, I heard the TV and saw Molly sitting on the balcony. She said hi, asked how my night was, gave me a hug. I played dumb, answered her questions, and went a bit quiet. I was working up the courage to say something.

She asked if I was okay, I told her yes. But she needs to come to the bedroom. She didn't ask questions, just shrugged and said, "Okay?" I closed the door behind us, quickly threw on some music over a speaker, and turned to Molly.

Her eyes went wide as I pushed her down onto the bed. I unzipped her jeans, yanking them off her body. She almost giggled, helping me get them off and her panties. She was bare from the waist down, wet as can be.

I dropped my pants, rubbed the head of my cock against her, and pushed in. She gasped and seemed to lose her breath. I didn't stop. I grabbed her hips, and started hammering into her. She grabbed for the sheets trying to steady herself, moaning all the while.

I pushed her legs back so her knees touched her chest, leaned over her, thrusting down into her. She practically squealed. I saw her in my mind, being fucked and begging for it. When she begged me to choke her, I did it. Hooked my arms around her legs, leaning over her, resting on my knees, hands around her throat and squeezing enough for her to grin and breath.

My orgasm was close, building quicker than usual. I didn't warn her, I didn't pull out. I just tightened my arms around her legs, squeezed harder for just a moment, pushed deep, and let myself spasm inside her. She sighed deeply, relaxing her legs, letting them fall beside her. I let go of her neck and legs, breathing hard.

I pulled out, wiped myself down, and went back out to the balcony. I didn't tell her last night what I saw. I won't tell her today. I won't tell her ever. But I'm gonna let it keep happening for now.