MIL irks me!

Backstory: I delivered my first child on Tuesday morning. I was waiting to announce it on Facebook until all my favourite people knew. My MIL came to visit and was snapping some photos of my little one. I didn't think anything of it at the time because I figured she would ask before posting them, or at least wait until I had posted something. When I looked at Facebook later on she had posted a whole album entiled "our wee little Kinley!". I was pretty upset, I get that it sounds petty but bare in mind that I am only 4 days postpartum and emotional as hell, 
I feel like it wasn't her right to post something like that without asking first and especially before I posted anything. I also HATE when she calls her "our" baby! How would you feel about this?