Bit of backstory: my mother and my sil have never really gelled but were cordial enough. Last summer, my brother (rather stupidly, imo) confided in a drunken call to our mother that he and sil were having issues. Mum offered a lot of (unsolicited) advice to the pair of them. For whatever reason, they only resumed contact at Christmas -and only because she sent them a card.
Anyway, mum sends them a 1st class letter tuesday last saying she is to visit briefly sunday and will they contact her to confirm. Saturday morning arrives and not a word from them. They eventually speak to mum but ONLY after my other sister called them (they never seem to pick up to mum-they have caller ID). They said they had other things on and couldn't see her. However, mum went anyway as she had other reasons to be in the area. She called them while in the area on the sunday and they went to see her briefly. But she says they were offhand and sil seemed to ignore her.
I think they're cutting her off. AIBU?