In the "P" family there are two boys and a girl. The oldest boy is getting married this summer. The fiancee "B" comes from a mixed family of about 5 or six siblings. I am engaged to "P" boy #2. "P" mother and daughter are opinionated, intolerant, self-centered and abrasive.
"B" and the ladies have a past of snippy behavior, though she tries, they keep up the drama behind the scenes. As a result, the wedding party consists of his brother and B's sister. I sort of thought I might be asked, but wasn't. FINE. But the boys' sister is refusing to come to the wedding if she isn't asked to be in the WP, It was suggested she could do a reading, which only further escalated her tantrums. The FMIL has sided with the daughter and said B is alienating her etc etc. Remember that not all B's siblings are included either.
I don't really want this girl in my future wedding party either, so I am biased with this decision here. B is holding her ground, is she out of line?