I am rather found of my ex in laws and I have been divorced from their daughter for 11 years. To this day they call me when they have a plumbing problem (no sexual innuendo intended. I am actually a plumber)
it 's not weird they might be friends..
no..sometimes those friendships out last the lover..it doesn't have anything to do with the ex.
I don't think it is weird at all. I still talk to a handful of parents of lovers past, too. In fact, I still talk to my ex's once in a while... and so does my boyfriend. Neither of us have a problem with it- as long as it doesn't hurt our relationship in any way.