Random rant so sorry

I hate how ppl just feel entitled to your baby. I love my bestfriend but she always refers to my baby as “our baby” and it irritates me I just don’t know what to say but my baby is mine and mine only I hate that she feels entitled to be so involved! She plans to buy a swing and bottles for her home because she thinks she will be watching my baby. I say all the time in a joking way that probably won’t happen. I don’t want to hurt her in any way or be mean but she has endometriosis/ PCOS and can’t have babies and I believe that may be the cause of her attachment however, it still annoys me that she’s so all over me