Sister has a boyfriend who I don't like but put up with to keep her happy. They are coming for Christmas staying with our parents. For the first time we are at ours for Christmas which I am pleased about. He has apparently paid to hire a karaoke machine for Christmas day. I hate karaoke I would have to leave the house for the day. He is planning on setting up in my hallway which is the main access to the rest of the house. The thought of not being able to talk for listening to him singing droney songs makes me mad. Ive told him no he is pissed off now he and my sister who I do want to see aren't coming. She is pissed off at me because I said no politely. I just said it'll be too much. Apparently it was a special treat and he has paid hundreds that he can't get back.
Unreasonable behaviour on my part or not?