-No one really finds out until after the birth of your child. Before that most people assumed you were pregnant with Rafael’s baby considering that’s who you’re “public” with. They just assume you’re really close with Sonny.
-After the baby is born Sonny and Rafael take a month off of work to help out and bond with the baby. That’s when Benson figures it out, then follows Rollins and then Fin.
-Fin of course has no trouble coming to terms with your relationship but he asks a lot of questions to be certain he understands. Fin is in love with your baby, every time he sees the little bundle he practically jogs over to be the first to hold it.