My sister in law is planning the shower. My FSIL is planning on attending and bringing her 2, 8 year old girls. This is something I've known about for a little whole now due to planning for accommodations. The invitations my SIL sent out do not say anything about whether or not to bring kids however I suspect others may bring kids as well. Today my SIL texts me "Question: How old are (FSIL) daughters and we're they on the invite list?" How should I respond? I don't really care either way but feel like I'm caught in the middle here and just want everyone to be happy. My SIL can sometimes be a difficult person and I try to avoid conflict with her but don't want to upset my FSIL either. Help!