Just that really, found out very recently from a third-party that my friend is having an affair with my ex. I don’t have any lingering feelings for him just fond memories of a first love. However, this does not sit comfortably due to the deceit to his wife & also feel she’s crossed a boundary getting with a friends ex, she hadn’t confided this in me at all which were the affair not with my ex I know she would have. My advice would have been to not get involved. If his wife finds out she will be devastated. Friend is confident he’s leaving his wife, although he hasn’t as yet.