On a long weekend break with my family. I'm 30s and my sister is a bit younger. She is spoiling the trip for every one, I don't want to say too much as could be outing but her mood swings and personality are having us all walk on egg shells and panda to her needs. I've bit my tongue because I don't want a huge argument. Thankfully we leave tomorrow but still got another night and morning with her. I understand she has MH problems because I've had them myself but I don't feel that's an excuse to be point blank rude to people. I feel she sometimes uses that as an excuse to get her own way. She threatened not to do something, we accommodated her wants and then she changed her tune. It's draining, im sad because I feel I can't talk to her incase I say something she doesn't like. Never used to be this way. Its getting my DM down too I know people will say just don't go along with what she wants but when you're away it's hard to keep the peace. AIBU to want to leave and not speak to her for a few weeks.