37, married 17, together 21

About to spend a few days with my wife's family and most of them can't stand her father, especially my wife. After swallowing the pill, I see now that he's a bit of a Chad with alpha tendencies, and an asshole. Wife hates him because he left when she was 5 and is a serial philanderer.

In the past, I've mostly ignored him and been friendly. I don't really have any respect for him either, but he definitely sucks you into his frame. Actually, he's got pretty good game too.

Any tips on maintaining my frame around him during the vacation?