Me and my STBXH separated earlier this year. Since the separation I have had a lot of clarity about a lot of things, including that I wasn't always that kind to my MIL. I never had a big argument with her but I was very anxious with her involvement with my children at times based on assumptions that I made and, although she did a few things which annoyed me; other times she couldn't do right for doing wrong. I want her to continue having a relationship with my DCs and, despite my XH cheating on me and being a massive arse, she has said that I will always be a part of her family. He haven't had that much contact since the separation, we don't have much in common, but should I apologise for not being very nice/welcoming at times? Or should I just leave it?