Legitimate story and not fantasy of hot wife/gf that lead from cu king

My gf 18yr old, I’m 22 cheated on me for 3 months with her ex bf before telling me.

I never was a cu k before. But she cried to me admitting it and I was so upset to begin with. After an hour of crying etc I asked her did she enjoy it and I wanted to know how long and to what extent etc.

She was still upset but she asked me if I wanted her to be truthful and blunt.

I wanted to know so I said yes.

She started telling when it started and for how long it happened. I was still so mad. I asked what they did and she started telling me how she’s let him fuck her probably 100 times over the last few months. Never had this feeling once but I started getting hard. I found myself feeling horny, sick and asking questions all together.

I asked what else she did and she told me she’d suck his cock and he’d eat her pussy.

After probably 5 minutes of asking and her answering upset she asked if I was enjoying it.

I got mad and told her to just keep telling me.

She knew she did something. She pulled my pants down and put my cock in her mouth and told me she ducked it better than she’s ever sucked me. She told me she let him fuck her face. etc

I was so horny

She told me there was one night she made me go down on her and that I commented it smelt fishy and at the time she blamed a uti. She admitted she had a uti from fucking him and that the smell was from when she fucked him earlier that day.

In the coming few days and weeks, I noticed she was messaging him. I asked her about this and she just told me to calm down and they they were just talking and that she’d show me her messages if it made me feel better.

One night, whilst I was fast asleep, I woke to the noise of soft moaning and the bed shaking a little bit, I came to and felt around and noticed my girlfriend masturbating quite intensely on the other side of the bed. I instantly woke up, and caught her masturbating to a picture of his dick. I was so turned on I wasn’t thinking straight and we had really intense sex.

A week later maybe I received a text from her while she was at work and it was like “ I can’t do this anymore, I need him sexually in my life but I need you romantically and sexually, and she just can’t ignore it” I immediately called her and we spoke for an hour. I was so mad, but somehow understood her needs She then said she’d like to see him tonight & asked if I wouldn’t mind staying at work an extra hour. I reluctantly accepted and she said she’d give me updates before during and after. She sent me pics of her shaving herself for him, updated me throughout, including when he got there and they started fucking. She sent me a few pics then when I got home she was waiting for me. I instantly wanted sex and so did she, I fucked her and realised his cum was still inside her.

This has gone on at least 5 times since then. And i hate this feeling so much but I’ve never felt more alive and sexually energetic.

I don’t know what to do or how long this can last especially if she catches feelings again for him.