I didn't know where to post this, so I hope that this is the right place.
I am just wondering about what relation your IL's family are to you.
Specifically, my brother got married recently. His wife's (my SIL's) sister sent me an FB request asking me to confirm that I am now part of of her family. FB is asking me to confirm the relationship. So who is this woman to me? Is she my SIL? My cousin? What...?
