Thanks, YouAreHere. Yes, I agree that some are very good at hiding their crazy. My husband and I knew this couple for going on two years and while certain things about them were a bit odd (most notably, how emotionally messed up at least three of their four kids seemed to be), we always thought they were both sane and caring people.
I'm still blown away that J. took me saying "We aren't allowed to have sex there, they are very strict about that" as "I want to have sex with you." It's not like he and I were always at it, far from it. We mostly just hung out. I guess there is no underestimating some people's egos!