So the Grooms mother and step father are refusing to show up to our wedding if the Grooms biological father shows up. The groom's Mother is mad that the father was invited in the first place giving that he is not much in the picture since they divorced way back in the day. Groom sent out invites. Father responding he was attending. We have not told Mother and step father as of yet in case he dont show up on the day of and both miss out. Mother claims, Bio father still has a thing for her and he creeps her out and step father if he sees him will punch him out. I feel really bad for my Fiance and his parents seeming very immature at the moment. I have met both parents multiple times and he is closer with his mother but still wants his father there. He only getting married once in his life he says. not sure what to think of the situation. I'm stressing out for him and i can see the frustration of the situation weighing on his shoulders. It sucks. Just needed to vent I guess.