This takes place a couple years back and all parties are 18

I was dating a childhood friend for around 6 to 8 months. Well in the last 2 month I noticed that whenever we fucked she would be loose. I even used big toys on her. Pushed them all the way in ans she still was begging for more. At the time I didn't put anything together just thought she was being a horny slut. A couple weeks go by and she texts me saying not to be mad. Always a good way to start a conversation. She sent me a picture of her neck all covered in hickes. I was furious, confused, and a little turned on seeing her like that. She explained that shewanted to test out her bi side with a female coworker. Young dumb I me let it go. 2 days later I pick her up for her to hang out. I got her back to my place and immediately went down on her. Seeing her marked up made so hard. Post sex we took a shower to clean up. I got done first so I sat on the toilet skipping adds when they popped up on her music. While doing so she got text from a guy called "husband" and it definitely wasn't me. I looked through the chats and sure enough there was no female coworker it was him. That was also wasn't the first time they hooked up. I kept reading. My hands were shaking in shock and I was turned on again. However this time I confronted her about it and took her home after. I drove home single. I thought everything was done and over with.

A couple weeks go by and the "husband" guy messages me. Talks shit about how I'm less of a man and says how much better she enjoys him then me. I am once again in shock shaking from this news and also raging hard. I try to defend myself against his claims but he keeps going. He also mentioned that she cheated on me with more then just him. Alsmot the whole relationship she was getting railed at home and I had no clue. I text up one of her friends asking if it was true and she confirmed it. So my ex was fucking around whoever for months and I was getting seconds. The thought still now upsets me but turns me on. The "husband" guy even sent videos of them fucking as a way to get me jealous. It didn't quite work how they wanted. I couldn't tell you how many times I perked off to those videos. Now it's led me into cheating porn and cuckold stuff