Mother in law troubles

Am I wrong to still be upset with my MIL and not talk to her/let her see our son?

I’m going to try and shorten everything that happened :

We lived with my MIL for a little over a year some of the time was before we got married

a few months after us getting married she started being really short with me and just noticeably upset with me and I wasn’t sure exactly why because we hadn’t had an argument or anything i was under the impression we were great our relationship had literally been perfect up until this point

Suddenly we started getting into arguments over nothing and she would tell me I’m just trying to steal her son from his family which I pushed him to be with his family and spend time with them so I’m not sure where she got that from

She called me evil saying I was manipulating her son and that I treat our baby as a pawn that I can just pull away when I’m upset

The reason she started saying this was we got into an argument and so I picked my son up and went to my room instead of leaving him out there with her which I don’t think i did anything wrong because 1. He’s my son so he’s my responsibility if I’m not going to be somewhere for a good amount of time he’s not going to be there unless he HAS to be 2. I was upset I’m not going to just run off and leave him out there??

At the end of living there she called me a bitch and said she won’t ever count our son or any future children we have as her grand child(ren) and that my husband is going to regret being with me because he’s choosing me and our son over his family

And my husband as been going to their house to pick up some of our stuff or get stuff from his step dad but he stays over there for hours and I totally get it it’s his mom but like she treated me horribly and was an angel to him (which I get it’s her son) but it’s kinda like he just forgot everything that happened and everything she did