My first Mil is lovely, was maid of honour at her wedding after I split with ex
we are still very good friends.
Second ex mil - where shall I start? -
I invited her to a party ( to bond) she bought round her grandkids and I ended up babu sitting and she went to party I invited her too.
She got upset when ex bought be an Easter egg with edible gold leaf on. Because he hadn’t bought one for her.
She tried to make me think ex was having an affair - he wasn’t it was a secret holiday he had planned.
She told her grandson he could be at the hospital when I was in labour if he was good in school. He was 14.
When I told her she wasn’t even invited there was a big fall out and she sat in the hospital cat park chain smoking when she heard of some one of gone on Labour - constantly ringing dh and telling him to let her in the Labour ward.
She went on holiday for six weeks to Spain then asked to borrow £1000 so she could set her business up two days before she was due to open. We said no as we needed it for a new boiler - massive argument.
She invited us round for family roast dinner then on the morning asked us to get a leg of lamb. We did. When she served up we noticed that people had *roast beef and our lamb’ - we just had lamb.
When dh and I fell out pre wedding she tried to buy the car he’d bought for me off him. The day he came back home she called round ( she must have been parked up waiting for him as she walked in 10 mins after him) and asked for the keys to my car in front of me I’d already hidden it 
She cried tears of sadness at my wedding, wore sunglasses to hide her eyes and wouldn’t speak to me.
She stole my Dds (5) bridesmaid head band and wore it all day.
She caused a massive family argument the day after my wedding before we all came home and I havnt spoken to her since. Three years ago.
She was a huge factor in the breakdown of mine and ex relationship and if I ever get in to a relationship again - their family will be deciding factor if I stick around.