My MIL is a complete nightmare - incredibly passive aggressive, prone to tantrums and sulking if she thinks you're being critical about her, ignoring her or not letting her get her own way but can also be a wonderfully kind and generous lady.
We've got ourselves into a situation where going NC isn't possible and reducing contact is equally as hard (we've tried and had texts and phone calls asking what she's done wrong this time and why aren't we talking to her!) but after today I'm ready to throttle her.
She actually makes my OH sick with stress and I'm after any advice or techniques on how to deal with her. She's only young (mid 50s) so we've potentially got another 30yrs of her and if I can't get a handle on things soon I'm likely to snap :(