M.K.
I don't get along with my mother and haven't since I was about 11 or 12. My husband thinks she might be bi-polar, seriously there is something wrong but she is very "woe is me and the world is out to get me". It's always me, me, me. Lots of arguing between us and I just don't want to spend time with her but do the same as you about the kids. I want my child to know her even though we don't get along. My father died 16 years ago and we had the best relationship, I miss him greatly everyday.
My in-laws are fabulous. Including my SILs and their families. We definetly don't see eye to eye on some things but we get along great. I love going to see them and I love for them to visit as well.