WW3!!! Bring it on.
I was always tip-toeing around my Ils trying not to offend them until the day that they went ahead and organised yasin's birthday party without asking me first.
I rang up and told them that there was no way in hell I was going. MIL chucked a wobbley and turned on the waterworks and I hung up on her.
I still can't stand her but since then she's not been quite so quick to interfere.