so annoyed

I don't know if it's just me cuz I'm a new first time and overprotective about my baby girl but I can't freaking stand it when my mother in law refers to my baby as her baby it annoys me to freaking death. I understand if say it once in a while but any freaking picture of the baby she comments on face book or text message she always has to say my beautiful girl, my princess, always has to say my instead of just saying how beautiful the baby is I don't understand why she always has to put some ownership to it and if she wants to do that well her babies are grown up and my baby girl is mine and her son's baby not hers she didn't make this baby I did. I carried it for 9 months and gave birth so I really don't appreciate her saying my baby. I don't know why I feel this way I don't hate my mother in law I actually like her but it just annoys me when she does that it could probably just be the hormones I also can't stand it when my aunt calls my baby my little girl cuz again it's not but she doesn't do it as often as my mother in law. I know I'm probably gonna get a lot  of negative Comments for being like this it's probably just hormones mixed with postpartum depression (I started getting help) I try to not let this bother me and try to see it as a good thing but I still gotta vent somehow.