Over bearing Gma. Need advice

So I’m pregnant and my gma is telling me oh when you have your baby in the next few months you can’t take her to day care she’s my baby. You have to have you child use this soap all the others are bad. Your baby has to wear this and only this type of onsie and only I get to dress her. And keeps saying things like I can’t wait till my baby is here so I can take care of her. And she keeps telling me what to do on how to parent. I know she’s just trying to help but she’s coming across as demanding. I don’t know why i get so defensive when she calls it her baby it pisses me off like this is my child I’m growing it it’s coming out of my vagina! So what can I do to politely let her know she’s overstepping my boundaries.