some families are just different, my mum never met my mother in law until they met when i got married 10 years after having my son, i see my grandson every few weeks and we usually go out, he sees his grandad (my daughter in laws dad) at his house most weeks as he does not go out, i knew her dad long before i even had my son as he used to come to the pub my mum ran back in the late 70s, we get on great when we meet up. some in-laws don't feel the need to meet up, you will probably meet at some point at the childs birthday. please don't take it as a snub, they could be shy or anxious or just don't feel the need to get to know you.