I'm kind of worried about my future mother-in-law. She has a lot of rules that I don't agree with (for instance she refused to meet me until after her son and I were engaged and even so I did not meet her for 5 weeks after I was engaged) and I find her incredably rude (she refuses to introduce herself to my parents and has announced that she may or may not be attending the tea I am throwing in order to introduce our parents, she also has refused to RSVP, she is pulling a similar stunt with the engagement party my parents are throwing). There are several other incidents similar to the ones I've already listed and in addition we have incredably different beliefs (for instance she believes that no one should be allowed to drink alcohol and that the earth is 6,000 years old while I am working on an advanced science degree and have a glass of red wine every night with dinner). I know that my fiancee and his mother don't get along very well but it's obvious that he loves her. I'm worried that at some point I'm going to snap and let her have it from biting my tongue for so long. Any advice on how I can work this situation without becoming Mt. Vesuvius?