For Christmas, I booked a weekend away for my brother and SIL to somewhere they have really wanted to go. Paid for flights and hotel.
They do a lot for other people and work really hard so wanted them to have a break together, as money is tight for them. My cousin and partner have invited themselves. Brother doesn’t want to say no as cousin is ill (still working but inoperable cancer). They now won’t have the weekend I wanted for them as because of her illness they won’t be able to do everything they want to. Their point is that they can’t say no and can always go again, whereas cousin may not be able to. Should add brother and SIL we’re not thrilled they have invited themselves as we’re looking forward to time together and see cousin all the time!
I am annoyed/upset and think they should say they are going alone as its gift for them, although understand this would be difficult. AIBU?