Advice appreciated please? backstory is that widowed MIL has always been very controlling and manipulative. Lots of emotional blackmail and sulking if she's challenged on her behaviour. We actually live in the same house currently although this will be changing in next year or two!
Now we have come a very long way in terms of boundaries! In the bad old days she was constantly taking it in turns to slag off one of her kids to the others, she got my dd hair cut without asking, booked her birthday party venue without consulting me etc and was just very controlling and entitled. When you said anything to her she would say "my husbands dead" like it meant we had to accept whatever she threw our way! She also told me she didn't think about her husbands death affecting her children because "he was mine first and I had him longest". FIL was lovely man and her behaviour has got much worse since his death. We let things go on for ages because we assumed she was grieving and angry.
Anyway dh had an argument with her a while back and told her she was impossible to be around and her behaviour was not ok. He said that we couldn't make her happy that was down to her. She went to Bil to complain and he actually sided with us (usually they all turn on each other). Since then things have been reasonably ok but I've noticed things creeping back in again and feel uncomfortable on how to handle it. For example when I was talking about my husband she said"I stick up for myself now" and implied that he bullied her. Dh has agonised over his mothers happiness so it made me cross that she would talk about him like that. She also said that bil was wrong for not arranging his baby's bday for her convenience and that it's no way to treat your mother, I've got rights etc.
The past 6 years have been exhausting and nearly cost me my marriage. I really thought we were getting somewhere but she's constantly pushing boundaries!
Sorry this is so long but do I confront her and nip it in the bud? Or feel happy I know she's full of it and that I can see through her. I just think she sees herself as the comets victim and it enrages me!!
But I know I need to be calm and sensible.