Hey guys! I need advice.

Long story short, my fiancé and I were supposed to get married this coming January, things came up and we postponed.. now we are ready for the commitment. My parents are divorced and my mom for lack of words hates my dad for things that he’s done in the past(he wasn’t the best dad so to say). He recently got married and I decided to move on from the past and forgive my dad and attended his beautiful wedding. My mom was furious and told me if I invite him to my wedding, she will not attend. Now.. my fiancé are torn between courthouse and not have to deal with drama. Or have a small beach wedding with his family and our friends?? Granted I have a dress already but I’m torn and heartbroken.