MIL from hell

I’ve posted a couple of times to vent about my MIL as she just gets on my last nerve. Previous post explaining how she kicked my partner out leaving him to have to pile his belongings on the street while we loaded them into cars late one evening. Disregarding our first born that we lost a year ago acting as tho he was never born when talking about our little boy who just arrived. Adding to this my partners sister was taking food at the funeral and putting in her pocket to take home without even asking! They have not been to our home in the 2 years we’ve been here, when invited cancelled the morning they was meant to be coming and when we went to tell them we was pregnant it was like someone farted in a lift it was uncomfortable. This is just the short of all the occasion we’ve had to deal with them. But now I’m just done. She has been throwing every little thing at me because we’ve not had them to meet our son after he’s been born. Even to the point telling her own son if we argued and split up she wouldn’t support him (we’ve been together 7 years) and then still acts as though she’s entitled to meet our son. She is blaming me and my mum (she’s jealous of the relationship my partner has with my mum) for her son not wanting anything to do with them when he’s made his own decision because of the way they have treated him and now me. But yet still she has messaged asking why she can’t see her grandson and shouldn’t we just be grateful to enjoy him and Christmas together?!? Sorry but how after literally sending messages to me blaming me for their own doing does she think we’re going to want anything to do with them. I have now had to block her number because of the disgusting messages she was sending