Back story: My parents are divorced, have been for years. It was messy and complicated and they don't really tolerate each other very well, though it has gotten better in the last two or three years. Both are remarried, my father to a great woman (C) and my mother to a man who can be decent when he wants (T). It's a bit complicated, because T is my godfather - he was my father's friend in college who married my mother's friend (K), who is my godmother. After both divorces happened, my mother and T ended up getting together, and are quite happy.
Here is my problem: My father remained friends with K after her divorce from T and through her subsequent remarriage (we were invited to her wedding) and birth of her daughter. They exchange Christmas cards and see each other about once every year or so. Dad wants K and her family invited to the wedding - they are friends and she is my godmother, so it makes sense. Plus, C and K are really good friends now, and I know she would be more comfortable if we were to include K, as she will not know many people there other than the family. My mother does not want K anywhere near my wedding. She and K never kept in touch well, especially after my parents' divorce, and it is highly awkward for her since she married K's ex. K and I have not seen each other in many years, but she sends me Christmas cards and seems to be really excited that I found someone.
Dad has included her in the wedding list. Mom has thrown a fit, is not speaking to me, and has even said that she is seriously considering NOT attending the wedding if I invite K and her family. T has said he will not attend if K does, regardless of whether my mother chooses to or not.
I don't know what to do. On the one hand, my father is paying for the reception, and this is the only guest he has said he feels must be included. On the other hand, it's my MOM and step-dad, and I can't imagine getting married without them. My mom also bought my dress.
My fiance and I are paying for almost the entire rest of the wedding (his family is paying for flowers). He says I need to make the best decision for me. I don't know what that is. Help?
C/N: My dad wants to invite a friend and her family. My mother is boycotting my wedding if the woman and her family are invited. My dad is paying for the reception, mom for my attire, and my fiance and I for almost everything else. What do I do?