Have name changed for this as DH knows my usual one and he might be annoyed about me posting this. Although if he reads this he'll know who it's about. Anyway..
I don't like my MIL at all, mainly because she is dishonest and manipulative with a massive victim complex. I had no contact with her for a few years after her and BIL1 stole from us but recently saw her at a family wedding. DH didn't go NC, he spoke to them occasionally on the phone. BIL has since found God and is apparently a reformed character. He's at least apologised and paid us back, she has never said anything. I don't want anymore trouble so agreed with DH to put it behind us. I thought this meant that if I saw her I would be polite, nothing more. We don't live near her and she has never shown any interest in our DD(4).
MIL lives with BIL1 in a rented flat, her and FIL separated 5 years ago. She owns a house that used to be rented out but has now been empty for several years and needs some work done to it.
Last night DH told me that BIL1 is getting married soon and decided he doesn't want her living with him anymore. He never really did but felt forced into it. They, along with BIL2 offered to pay for her house to be sorted so she can live there but she refused and said she wont live by herself. She wanted to get back with FIL, but he said no. She has now decided that she will live part time with each of her 3 sons, spending a week in each house. They agreed to this. BIL1 has not asked his fiance, BIL2 did not ask SIL (her and MIL detest each other) and DH did not ask me, he just told me that this is how it is, and it's not a big deal. He says I need to be the bigger person and that even if she's awful she's still his mum. He said she's old (she's actually 59) and she's ill (made up heart condition).
I've been completely blindsided by this, whenever there was problems in the past he was always on my side. She is the kind of person that could cause trouble in an empty room, she thrives on drama and has always played her sons off against each other. She tried to do it with me and SIL too. I cant cope with her mood swings, lies and attention seeking and don't want her around DD. She lived with us for a month before I went NC with her and it was probably the worst month of my life. DH says she'll be better now and I need to be positive. I just want to run away. I don't think this is fair at all and I'm horrified that he's just burying his head in the sand. He works very long hours and I'm a SAHM. It'll be me that's with her all the time, she barely goes out, and doesn't know anyone where we live to visit or anything. AIBU?