It's normal to talk about big things that are going on in your life. Talking about the daughter's wedding to her friends is pretty normal. No one has to be super into weddings to do that. Clearly you can't imagine the LW being unreasonable, but I'm pretty sure that most people do not care as much as the LW does and it's not on the friend to be psychic and know that the LW is so hurt by this terrible, terrible slight and never wants to hear a word about the wedding.