Most Helpful Girl
Tell the man his fiancé's a skank, and that you're the fuckboy who fucked her so he won't have to waste money on a wedding with someone who cheats, or you could tell this man that you're a fuckboy who fucked his skank of a fiancé, but that she should forgive her for this one mistake since he has also cheated and shouldn't be a hyrocrite. Either which way someone has to be honest about it because secrets like this will ruin a marriage.
Most Helpful Guy
I don't think she should get married that's for sure, she should just break off the engagement , there is no loyalty left in that future for either one of them