Don't want to attend grad night
I recently got a high school graduation invitation for my niece. I don't want to attend for several reasons. I don't like to fly and they live a couple states away, I don't like my sister's in-laws, and my sister and I have a strained relationship. She attended my daughter's graduation last year and I feel the only reason she did it was to make me feel obligated to go to her daughters. I would like to just send a card/$$ and explain that I am not able to make it. I think my sister would be upset although I know my niece wouldn't care one way or the other. I know this would cause a bigger riff between us. I just don't know what to do.