My mother in law actually really hurt me today and it's hard because I know she doesn't do things…

My mother in law actually really hurt me today and it's hard because I know she doesn't do things maliciously...she just genuinely doesn't know. She texted me out of no where asking if I had the Pat the Bunny book. I told her not unless she got it for "him", meaning my son since she recently got him a bunch of books. She goes "it's not for him it's for her" meaning my daughter. It just of got me the wrong way because it felt like she was trying to "seperate" my kids all the way down to their books. I mentioned we were on our way to find a bookcase for all the books we have and she told me she actually got one for us and it was meant as a surprise. I was super thankful and then she goes "but I guess you could still get one for Michael, this is for the nursery". First off, if it's going in MY house I will put it where ever I please. Second off....they are everyone's books. How fucking petty would it be to have two sets of books and bookcases when my son can't read, my daughter isn't born, my son enjoys all the books we have. My son isn't going anywhere. She posted an article a few days ago something about "13 things all new parents should know" and my fiance stepped in and goes "this isn't her first time". I never stopped being a mom. Fuck, if anything my fear is wondering if I'll be able to love a second child as much as I love my son.