We're both 22, been dating for a year and her sister is having a birthday dinner hosted this Friday for her 20th bday. I was told about this about 2 weeks ago and flat out said I'm not going to go to that restaurant because my dad used to be a manager there and they treated him extremely badly and basically forced him to quit. This was in 2014 and I won't forget the shit they put my dad through and it was a terrible thing to do to another person. I told my GF that but she's like how it was so long ago and its a really good place now I doubt they treat their employees like that still. I just told her I don't want to spend money at a place that treated my dad so badly. I told her I'll see her sister the next day and get her a gift. She called me an asshole and said I'm being inconsiderate.

AITA?