I'll try to keep this as concise as possible.
Have been with dh for a total of ten years. MIL was strange but bearable at first but then when FIL died suddenly (they were divorced 20 years earlier) I saw her true colours. Everything was about her. She ran off with the will to the bathroom and we found her running through it saying 'I cant find my name anywhere' (why would it be). She was a total bitch to FIL's girlfriend, and was saying she wanted FIL's car, money etc (but everything was left to dh).
She has got stranger as the years have passed. She dances and sings for us in her living room (!), which makes me very uncomfortable. She says bizarre things. She says hurtful things, like asking if I had a baby under my dress (I hadnt lost my tummy baby weight yet as well she knew). She makes loads of comments about our parenting of ds. Once he was howling his head off as a baby and I was running about trying to get his bottle, and she walked in and went over to him and said 'oh poor love, are they neglecting you?' And then added 'I'm joking. No, half joking'. i could have ripped her bloody head off but said nothing.
Its got worse lately. Ds has been unwell with a gastric bug which has turned into reflux. She kept texting me saying how frightened she was, and then when she came down she said that as an ex paediatric nurse she saw lots of kids go into hospital and not come out. Yeah, cheers for that. She also said that ds's 'arms look thinner, maybe he needs more protein'. I told her he has actually put weight on.
Worst bit: she hasnt worked for 25 years and has her ex partner under some bizarre contract whereby he pays for her mortgage and all her bills. She talks about him shockingly eg 'oh god if he died Id be screwed' and she is now trying to get a £500,000 settlement out of the guy. No, I dont know either. He offered her half of the house money today and she wants more. It makes me sick. I think she is an awful person (no I dont know how this arrangement came about, I darent ask).
Its got to the point where I feel stressed about her coming weeks in advance. Dh cant tolerate her much either but she guilts him into it a lot. We see her for a few hours every few weeks but even that feels intolerable.
Any advice? I dont want her around me or ds anymore.