I never really got on with my own MiL after I was told she had someone else in mind for her son and he messed it all up by marrying me! I was an ‘outsider’ and she never quite got over it. When my son married, my DiL came with a lot of emotional baggage, made it clear that she “didn’t do families” and kept me at arms length for a long time. By the time she had stopped seeing me as some kind of threat and I felt that we were just about making some progress with our relationship, she was diagnosed with and eventually died from an aggressive cancer. My new DiL and I seem to rub along pretty well. We are very different people and I think I am a million miles away from what she ever thought her mother in law would be like (she is very feminine and I am, well, a weird scruffy old bag basically) but we can always find some common ground and have a laugh. Not living close to each other probably helps too!