I want to preface this by saying that I love my future sister-in-law. She's a wonderful person, and we get along great. But...I really don't like her six-year-old son. My fiance and certain members of his family honestly believe this kid is on the spectrum in some way. He screams, he's destructive, and we don't want that at our wedding. Our venue is on a working cattle ranch, and the owners live on the property, so for safety concerns, we're having an adult only affair with the exception of my fourteen-year-old future stepson. My fiance at least wants to have his niece there but not her unstable little brother.
Neither one of us wants there to be any resentment in the family as we go into this marriage, but if that child comes to our wedding and ruins that day for us, I don't think I could ever forgive him or his mother. How do we handle this situation? PLEASE HELP!