MIL pretty much went no contact with us because we asked how long she'd be staying
My weird-ass MIL thinks this question is super disrespectful, whether it's asked before she arrives or during her stay. She used to visit a few times a year and she'd never buy her return ticket before coming. She'd always buy it during her stay, and only after we brought it up like 10 days in. She'd basically stay as long as she felt like it until we kindly asked this question, and even then she'd be visibly upset over it.
I was getting a bit fed up with this and thought it was our right to know how long she'd be staying beforehand, so that we could mentally prepare for it and also plan our days in accordance with her visit. I figured it was a pretty standard boundary to have.
So the last time she let us know she'd be coming, we asked this question through text and she instantly acted like we insulted her. We tried to explain that it wasn't personal (I ask this question to my own parents as well and they're not at all offended by it) but she just made a huge deal out of it and decided not to come at all, to which we said ok, lol.
That was 4 months ago and neither of us have heard from her since. She left my last text on read. She didn't even celebrate my husband's birthday. I was pissed on his behalf and he was upset too. This is extremely immature behavior so I'm not even sure I want her back in my life after this.