opinions please, I had my baby shower last Saturday and my MIL asked what I needed and one of the…

opinions please, I had my baby shower last Saturday and my MIL asked what I needed and one of the things was a baby carrier so she got me a carseat thinking that's what I was talking about but I already have a carseat combo, I didn't tell her that cause I wasn't trying to be rude but I want to return the one she got to get the other things he needs but my SO said she'll be offended. what would you ladies do?