Dear Prudence,
I am moving temporarily overseas. Since summer is coming, I thought of inviting my two nieces to come visit. I would pay for the plane tickets. One is in college and the other will be starting high school. My brother is engaged and his fiancée is particularly pissed off that I didn’t think to include her 17-year-old daughter in the offer. I accidentally overheard her talking with my brother; he forgot to hang up, and she was saying nasty things about me over this. I have never met this girl. I only met the fiancée this Christmas for a few days at our parents. I was happy that my brother found someone, but this reaction is so bizarre and out of left field that it leaves me stumped on how to proceed. Do I talk to my brother about it? Ignore it? Bring it up to my other two siblings (parents of my nieces)? If my brother wanted to bring both of them on a trip to visit me, I would be more than happy to host. But only if he was there. This entire situation just makes me leery.
—Trip Advice