We have only met FI's sister's boyfriend one time. I don't want to be rude and I really don't want to upset FI's sister, but I don't want to include this guy in our wedding photos. He was not included when FI's oldest sister got married in September, but nobody in the family had met him at that time. I don't know him well at all, and I do not know that he will become family down the line. My brother's girlfriend will be included, but she is one of my bridesmaids and she and my brother will be getting engaged very soon. I don't think that the boyfriend would be offended-- he wasn't upset at all about FI's oldest sister's wedding. I am a little concerned that FI's sister will throw a fit, she tends to cause tension within FI's family. So, the question, is there a delicate way to approach this before the wedding?
Thank you in advance!