Threesome [gf22] turned into a cucking and then cheating [True story]

It all started pretty innocently. I enjoyed sharing nude photos of my girlfriend Madison and loved the fantasy of sharing her with another guy. So sending Micah her nudes was a huge turn on for me, weirdly. Part of my fantasy was the guy needed to be a lot bigger than me and I had seen him before. He had the biggest dick I had ever seen that wasn’t in porn. An absolute tree trunk. Thick and hard with pulsing veins. Something I could never say about myself. He never shied away from telling me how hard the pics and videos made him. I loved hearing how attracted he was to Madison and she loved the attention from it. Knowing how her body made guys feel. She was a virgin when we got together in high school and at 22 I had still been her only sexual partner so the idea of his third leg stretching her out was intoxicating to me.

I guess after a few months of seeing her naked off and on Micah decided he wanted more. He asked me if I would ever let him in bed with us. He said he wanted his dick down her throat while I was fucking her from behind. I felt my stomach drop reading this because it had always been my ultimate dream. I sent him these pictures and imagined what he would do to her. He assured me he only wanted her to blow him while I fucked her. He wouldn’t try to disrespect our relationship and push further. I pretended to be nonchalant and told him I would talk to her and see what we thought.

When I brought this up to Madison she was hesitantly turned off by the idea. She said her love for me only let her see me that way and didn’t like the idea of another man. I told her that I would obviously never put her in an uncomfortable position but explained he only wanted head. I knew from conversations I had with her previously she loved the idea of being used by 2 guys. Our sex can be rough by only in the bdsm way. I was never big enough to fill her how she needed to be so I made up for it in other ways. She told me the next day she went to bed soaking wet thinking about the idea of her being a sex toy for me and him. She said she wanted to be our slut and do whatever we wanted. She was embarrassed to have been that turned on and wasn’t sure if I would be upset about her wanting his dick in her mouth. Admittedly I was a little nervous at this. Her wanting him so deeply after one conversation. She asked me if she could talk to him and get an idea of what she would get from him if we did this, I obliged and that Friday we had Micah over to drink and talk about the whole idea. We had no intention of doing anything that night but we had no idea what the liquor would bring out of us.

We drank and talked about boundaries for the first 30-45 minutes. All agreed if we did it there would be no kissing with them, only head while I fucked her, and we didn’t want anyone to know about it. Very simple I thought. Then Madison asked the question that started it all. She looked at him with a nervous smile and asked “how big is it”. Micah looked her and said “I can just show you while I’m here” and laughed to himself. He stood up and undid his pants, slowly letting them fall to his feet and slipping his soft cock from his underwear. It was a sight to behold, even as a straight man I was just in awe looking at it. He was thicker and as long as me hard when he was soft. Madison looked for a second then got off the couch and gently pushed her hand onto him. The biggest smile on her face. At that moment I didn’t exist, I sat on the couch as she slowly started to rub his dick and look up at him looking for the cue to keep going. He looked at me questioning what to do. Micah respected me and I knew he wasn’t sure if it was okay. To break the tension I just said “well I guess we’re going to do this” and got undressed myself. By that point Madison had already put Micah in her mouth and I could see him growing with each stroke of her head. She began to fit less and less in her mouth before she was only able to the first half of him down her throat before gently gagging to her herself.

Micah sat down on the couch and held his dick at the base to keep it sticking up for her to slide back into her mouth. Before she went to him I slid her pants and underwear off and ate her out while she blew him. When I could feel her dripping down my face I knew it was time to fuck her. I told them we should move into the bedroom and get going. Micah laid on the bed and Madison went between his legs with her ass in the air. Thanks to the alcohol I was able to last a lot longer than usual. To the point we needed some lube to keep going. I left to get some and Micah trailed behind me. In the hall he said “bro you gotta let me fuck her just for a minute. I’ll never cum if I can’t”. Drunk and insecure I said I was unsure about that. He went on to tell me he would be easy and only go for a few minutes to get closer. “I promise I won’t go hard. She’s your girlfriend not mine.” I said I would ask her when we got back. Hoping she said no.

Entering back into the bedroom I told Madison I wanted to switch. I asked what she thought and my heart sank when she smiled and said okay. I froze and watched Micah walk over to the bed with his dick swinging from leg to leg. He lubed himself up and slowly slid inside of Madison. I felt like crying at this point and had no idea what I was letting happen. Madison had my dick in her hand and the other on the bed as she lay flat on her back. Even if I hadn’t had my eyes glued to his massive dick pushing it self in her I would have know when she gasped and gripped my softening dick in her hand. The noise she made just from him entering was something I never her from her in our entire relationship. He kept his promise for about 5 minutes. Slowly going in and out never going more than half way in. Madison moaning and squirming through it. But he started going deeper and deeper. Quickening his pace until he had a steady rhythm of movement. Their bodies began to make a symphony of rhythm. Slapping together as he pounded her into the bed. She was screaming in pleasure at this point and let go of my dick. I didn’t know what to do and watching this while making eye contact with Micah when he would glance up from watching himself slide in and out. I moved away as Madison grabbed the back of his head and brought him down for a kiss. Moaning even as she kissed him. She hugged his head down to her as he fucked her faster and harder than I ever could. I didn’t even understand how she was taking him so well only having my 5 inch dick up to that point. I walked around to watch them from the back and saw her and him completely covered in sticky cream. Something I had only ever seen once. He hit her with passion and power and she responded with ultimate joy. Her screams hit a climax and I saw her legs shaking in his shoulders. This must have been enough for him because he immediately pulled out and shot his load up her belly with enough force to hit her face. She was laughing and shaking as he covered her in cum. I could have thrown up at that point. I knew that I would never even began to compare to what she just had and I was sick thinking about what he had just done to her.

I left the room and Micah came behind. He walked up smiling at me and just said “I’m sorry. I felt her pussy opening up to me and I couldn’t help myself. I got lost in it”. I told him it was fine, I just wasn’t ready to see that and didn’t think we were even doing it that night. I said he could sleep on the couch if he was too drunk too drive home and went back to my bed. Madison was lying there on her phone like nothing happened. Even asked me to bring her a towel, said she had too much “pressure” on her to move. I brought it to her and asked what the fuck just happened.

“I thought you wanted that? You said you wanted to switch and Micah was whispering in my ear you asked him to fuck me”. I was shocked. I was just ready to sleep this off and figure out what to do tomorrow. I woke up in the middle of the night and Madison wasn’t next to me. I laid there wondering where she was and then I heard the hushed moans and clapping again. I peaked into the living room and saw her on top of him, riding him and holding her hand on her mouth trying to mask the sound of him fucking her again. Her back to me and her head thrown back in ecstasy. I was hurt but insanely turned on by this sight. I jerked off watching them on the couch and then slumped back into bed utterly defeated. I fell asleep before she even made it back and we’ve never even talked about that second round they had. The next morning Micah left and Madison said it was fun. I told her I didn’t like it because it felt like I wasn’t even there. It was her and him and I was forced to watched. We haven’t made plans for anything else even though she asks about him and what he’s doing some weekends. In my mind it’s only a matter of time before she realizes I can’t be enough for her, I just hope she gives me the option to share her rather than lose her forever if it comes to it.

Clearly this would count as her cheating on me. A lot of people wouldn’t have dealt with that. But to me she let me live my fantasy and I asked her to do it. There is a mix of love and hate of the night when I think back to it and I can’t say I wouldn’t do it again.