Just that really. I've been with a guy for about 9 months. Its bothered me all this time that a week before his wedding to his ex he got oral sex from someone else. Only recently did I find out that his ex found out because the woman told her, not because he did. It also seems that he denied it at the start and dismissed it as rumours.
I'm not completely in the clear, when I was a teenager I kissed another, it wasn't planned, I was very young, in an abusive relationship and wasn't ever going to marry the horrible guy so it feels slightly different considering he arranged this meet up, was late 20's and had been with this woman for 4 years. His excuse was that they generally cheated on each other and it became a bit of an eye for an eye situation. But hey, maybe its not that different really.
Has anyone here had a successful, faithful relationship with someone with a history of cheating?