Mil ruined my wedding

We only had 15-20 people at my family's cabin so very small and intimate. We had issues with mil a few times before the wedding but we felt obligated to invite her because you SHOULD be able to invite your mom to your wedding. We have some beef with his sister so she wasn't invited for reasons i wont get into. Mil was informed of that before the wedding even happened. So mil shows up, first thing she says to me is my husband is making a mistake (i was 2mo pregnant with our first btw) then goes "just kidding" and said it while no one was around. Then the whole time periodically keeps saying "this is so hard for me"(she was the only one saying anything like that) it seemed like she wasn't happy for us at all and with it being so small and intimate it kind of put a damper on the whole thing. During dinner she insisted on sitting next to us and talked about drama the whole time and said i needed to let her plan my baby shower since she couldn't plan my wedding (baby shower is in a week and shes not even invited). Also, when she first showed up she brought out pictures of the sister and told my husband to set them out "so she could be there in some way" he didn't put them out so she took it upon herself to do it. After dinner my dad foolishly invited her and her husband (also a very odd dude) back to the cabin to be nice but hoping they'd decline because everyone was noticably exhausted. They came back for FOUR HOURS and all she talked about was drama and every bad thing that happened in her life. She made the ENTIRE DAY about herself and i really feel like i can never forgive her for that. 2 weeks after the wedding she messaged me asking to go shopping (ive been with my husband for 7yrs and she's never once asked to do anything with me) so i declined and told her exactly why. She denied doing or saying anything. So, my husband called her out and yet again she denied everything and said maybe we we're just the problem. Haven't heard from her since, almost 4 months and we hope it stays that way. She caused so much hurt to both of us on what was supposed to be the best day of our lives and we were trying so hard to enjoy we feel like we just can't forgive her for that and shes too selfish and toxic to have in our lives. Still processing how to feel better about this situation but right now im just extremely angry with her and want absolutely nothing to do with her but i know once i give birth she'll probably come back all entitled to my child and that'll be a whole other situation to deal with. His sister ruined our engagement by making it all about herself and starting drama and now the mom with our wedding. 2 moments that are supposed to be the happiest had huge dampers put on them because these people are too selfish and i just want my birth to not be that way too... I feel bad for feeling the way i do but the way she acted was completely unacceptable and i feel like it's all we really remember from our wedding day now because she was doing these things the whole time and the night ended absolutely horribly...