I was still quite shy when we had our son. I wish I had been more like I am now. I'd put put my foot down a lot firmer.
X2!
Yep! Couldn't agree more on everything above.
I was the exact same here. And most definitely zero tolerance for anyone connected to behavior like that with children. Most abhorrent.
I don't even know if I'd be as gracious with the MIL. She'd probably be banned too.
If it were me...I'd likely make sure I have at least one, maybe ever two kennels worth of chicks/chickens in my kitchen just to freak your SIL out for good...lol.