My best friend booked and paid for flights overseas for a week in Sep for me and two friends. My sister on the other hand wants to celebrate her 10year anniversary and renew her vows the same day I leave. Her actual anniversary is 3 days before hand.
No time, date, invite or place has been set, only a brief conversation 2 months ago where she was said she was thinking of renewing her vows.
Yesterday she asked me if I was available on her anniversary date, which I said I was. She then realised her anniversary didn’t fall on a weekend and told me she wants to have it the day I leave.
I tried to change the flight to the next day but it will cost me another full fare (money which I don’t have). I’ve asked if she could celebrate it the weekend before I go or upon return but she won’t budge. Her reason is because it’s bad luck, I should have known and thats it’s her daughter birthday. I’ve also asked if she’s could help me pay for the flight so I could change it but she said nothing. She is now making me feel guilty and now now accusing me of choosing friends over family.
Am I being unrealistic? Should I have considered this when nothing had been formally set. I don’t know what to do. I love my sister but she’s making me feel so bad.