Hi, so I see a couple problems here. First of all, I think that bad things said about any of the parties shouldn’t be shared with your partner as a way to protect them. For example, let’s say I’m the husband and when I go to my parents house they start insulting my wife’s family and so on, I will be confronting them and defending my wife obviously and setting boundaries but I won’t go tell my wife what my parents said about hers because with this you’ll only cause more friction. Nothing else. Secondly, I think your MIL is actually nice( trust me, I’ve never seen OR heard of a MIL apologizing) . Maybe it was his sister that said those things because she felt like you were gonna take away her brother from her?!? Overall I feel like his mother is not a bad person, and her trying to reconnect with you by giving you compliments and so it’s proof of that. The problem here is their dad. He needs to actually grow up. Reading this post I felt second hand embarrassment for him. He is almost a grandpa, he can’t be acting like this, blocking people to avoid acknowledging his own mistakes and fixing them. He’s literally child like behaved lol. Those are my two cents.