Girlfriend fucked a guy I don’t like and he’s bigger

My gf and I (both 19) have been together for 6 months or so. We broke up and briefly before getting back together after a couple weeks.

During that time we both ended up getting with different people. I got with a girl I was friends with for a while and she got with someone too. I think we both knew that we got with other people during the break, but not who.

Anyway we eventually ran in to each other again at a mutual friends house and started talking again and eventually started dating again.

We exchanged brief details about who we got with during the break and she told me that she got with this guy that I don’t like. They had been somewhat friends for a while and I suspect the day he found out we broke up he hit her up. This kinda annoyed me but it’s whatever we weren’t together and she can do whatever we want. I told her my feelings about him and she said that he was a dick and she wouldn’t do it again.

A couple weeks later we were talking and eventually got on the subject of her hookup with this guy. We eventually got on the subject of dick size and I don’t remember exactly what was said but she basically admitted he was bigger. He was taller than me and very lengthy and skinny so tbh this doesn’t really surprise me.

Still, it was another gut punch as not only was it someone I didn’t like he was bigger than me. She assured me by saying something along the lines of I am plenty and I fuck her better.

Our sex is pretty great and we both know each other well in bed and try out different things. She loves to get pounded and always wants me to be as deep as I can in her. I’m always able to please her and she’s never indicated that I’m inadequate.

I can’t compensate for pure size and I just know that she was probably super happy with a big cock. I’m not small myself probably around 6” and pretty thick so for her to notice a difference I’m sure he is pretty big.

I’ve never been into any cuck or share fantasies or anything like that but the thought of her fucking a bigger dick that can reach places that can’t is really hot. I’m getting rock hard just writing this out. On top of that the idea that it’s someone she now knows I don’t like is even more exciting.

I’ve never felt like this before and I just can’t shake the images of her getting railed by a big dick out of my head. I’ve never been insecure about my size or I’m ability to fuck her but now it’s something I think about a lot. We still have great sex and she doesn’t seem to now be unimpressed but idk.