My fiancé has only 1 sister, she's the baby of his family and 18 years old.  She has never been respectful of me. I have been around for over 3 years  (engaged for over a year) Her being the only sister of the family out of 3 boys, I've always tried to get close to her and invite her to do "sister like things." For example- going out for pedicures, makeovers, spa days, lunch/dinner ETC and she doesn't budge, or leaves my messages on seen. She's never addressed me by my name, I've always been "her" or if given anything it's "here." Almost as if I'm just some stranger.. my fiancé has spoken to her and told her she doesn't have to like me, but to respect me. For years, it's never happened. I'm not putting her in my wedding, more than what I've discussed on her part has happened. I truly don't think she support our marriage that's why I truly don't trust the girl.  She is invited to the wedding but not an attendee.  YET all her 3 brothers are grooms. I don't feel bad, but not she's calling my fiancé wondering why and upset. My fiancé told her to talk/ask me, but she refuses. My fiancé wants to have peace and everyone included FOR THE DAY. Aside the drama that's happened. What should I do?

He's very ugly with hair in the wrong parts if his body because of bad genetics and she's only in it for the money. And they are hardly even what you'd define as modern-day religious law-abiding Jews here in New Jersey. It's more like an atheistic wedding for pagans who's great grandparents were Jewish and they still have the bad genetics.