So, we've been together for over a year..and we were having some problems recently. About a month or so ago I got on her computer and saw that she had left open a website. The site was some kind of "sugar daddy" website. I didn't think much of it until a week or so later when I had reason to believe she was seeing someone. I confronted her about it and she denied that it was a sugar daddy site, but that she had gone out on a date with someone she met online..but it was strictly just a dinner date and that was that. There were a few instances where I suspected she was out with someone but she only admitted to the one time. Well, I wasn't convinced. Since then, she has been open with me about everything and she's gone out a few times with this one guy who paid her $4,000 to hang out a few times a month..which of course, is "our" money. I did some more snooping around and it turns out I was right all along. I found a facebook message between her and her best friend..about a month ago (as I suspected) she did meet with a "sugar daddy" and they had sex and he paid her for the night. I think this happened twice. She actually told me about this night but said that it happened a year and a half ago before we started dating. I asked her to come clean with EVERYTHING and gave her the perfect opportunity and she lied. Now, she thinks everything is happy and back to normal, but now that I know the truth..I think that was the last straw. She mentioned that the guy from "a year and a half ago" has contacted her about meeting again sometime within the next month.
Basically, I know what I have to do..but I wanted to get some input/advice/etc. So, what do ya guys think about that one?