I've been on a 3 night city break with my relatively new partner and our two children (his DC8 and my DC12), first holiday together with kids. My sister wanted to take her DC8 to the same city for 1 night which happened to be day 2-3 of our stay, their hotel being the other side of the city. She wanted to meet up with us, but as our stay was quite short and this was our first 'family' holiday (and she has form for lacking boundaries) I warned her that we had lots planned and would do our best but couldn't guarantee anything. As it turned out, me and my DC were free that evening for dinner so we met up and had a nice time.
They were meant to leave the next day, but she called and said they were staying an extra day and guess where? In our hotel. I said that was nice, but my spidey sense was tingling. This followed:
Me: we'll be back late tonight, going straight to dinner once we're finished here
DS: that's OK, we have to go back to our hotel to get our things anyway. Let us know when you're back and we'll come to your room.
Me: probably not a good idea as DSC8 gets giddy before bed and we have an early start tomorrow
DS: ... oh... tomorrow then?
Me: sorry, its our last day and we want to pack as much in as poss. Might bump into you though, we're on the 5th floor.
Then a bit of smalltalk and goodbyes etc.
My AIBU is, I suppose, was she cheeky to assume that we'd want to spend more of our time with her and book our hotel? I felt like she was and I had to draw, and stick to a boundary that led to disappointment for my DC and DN.