Girlfriend keeps having sex with black guy behind my back
So basically a few months ago we decided to try cuckolding, at first it was just over text, but she found an actual dude to fuck quicker than I thought. I didn’t really think much because at first it was kinda just hugging but then she started full making out with him, so I asked her if we could maybe stop and every time I asked she said yes we can, but she would always end up having sex or making out with him anyway. First thing she did was sucked him off and let him fuck her with his tip. They had sex about 7 times till now, and every single time she didn’t tell me until a few days or weeks later because “it makes me so horny”. She hasn’t seen him in two weeks, or atleast that’s what she told me, I really doubt she’s telling the truth.
I also remember however at the start she said “I said yes to dating him, but just for sex”, but later she would deny this. After this happened I noticed her being online a lot but never responding to me, which is something very out of character for her. She also mentioned many other times “What if I told you I was dating him” but then she would quickly say it was just a hypothetical. What do you guys think? What should I do? At times it makes me so horny but other times I’m miserable.
I'd resort to violence against that black dude