Should I tell my fiancée that I’m bisexual and had sex with her dad?

I would advise him to invite his fiancee , intended  father and mother in laws to appear on the Jerry Springer show

In this case he should let sleeping dogs lie, what good could possibly come from this revelation. She hearing this may very well create a rift between she and her father, I am not even going to bother say as well as with him because that relationship can part ways, to have a father and daughter drift because of this is rather a sad thing.

Their behavior speaks to recklessness, yes he is bisexual but was he not able to find another person to act this out with other than her father?! Why oh why.

He should just call off the engagement and tell her that he met someone else, with time she will get over him.  >