I don't know what to do. Our old girl friend (single mom) is currently a mistress of our old classmate whose married and with kids. They constantly see each other for sex. We are worried for our friend if she gets pregnant, especially they don't use protection as she told our other friend, and we also feel sorry for the legal wife, we saw an old post that she has a hunch or something about her husband. We can't take this anymore, we feel sorry for the kids and the wife. We will do something about it. Sorry old friend.