Diving into cuckolding and her liking it maybe too much! [first time] [cuckold]

My girlfriend and I have been together for a pretty long time and we’re only 21 now. We lost our virginity to each other years ago and after a while our sex life kinda became vanilla or boring for her. We tried a bunch of different “kinky” things but it wasn’t really our thing too much. One day when we were talking about new stuff she mentions what if we tried a 3some? I thought she idea was hot and was thinking of many different girls we could with. But then she says she would only want to do it with another guy because she would get jealous if we did with another girl. Fair enough and I agreed. It took a few months but we found a guy she agreed to and we met up and talked a few times before it actually went down. She’s been talking to him a lot and was very comfortable with it. He came over and we chilled for a bit before it started to go down. And once it did I started to get nervous. He pulled his pants down was no joke was probably 10” and already fully erect. When I did I couldn’t get hard, I think it was the nerve but I could not for the life of me. I knew they both wanted to continue with what was happening so we did but I didn’t get hard at all even thought I was so horny. I ended up hanging out in the room kissing her and eating her pussy/ass when I could but they ended up fucking for 2 hours before he came and soon after left. My girlfriend had cum more than she ever had in her life and was in a state of euphoria afterwards. For the following few days it was all we both could talk about.

About a week late he asked her if she wanted to come over. We talked about it again and finally agreed it wouldn’t be anything they hadn’t done alresdy. She was extremely excited for it. I dropped and picked her up…. And she was in very different states. I’d knew what they’d done by how messy and happy she was when she got in the car. It was then I knew I figured this was something that would happen a lot more often…. And I was correct. Since then she’s taken other men as well and is more sexually satisfied and hornier than ever now. Don’t think we’ll ever be able to go back to what we were before!