His dad sounds kinda like a jerk. Is he not happy about this wedding or what? But you are totally right, you should be upset! The Father of the Groom is supposed to host the rehearsal dinner and even make a speech! He's obviously known about this wedding so he spent his vacation on purpose. It might be better without him there if he obviously doesn't care enough to take some time off from work for his son's wedding. Good luck, girl. This is a tough one.