Family Member Announced Pregnancy On Facebook

A family member of mine took a picture of me on Mother’s Day. She then posted on Facebook and announced to our family that I was pregnant without asking me first. I had only announced to my immediate family that I was expecting and this is something she knew. I called her upset and asked her to remove it. She said ok and said she would. Afterward she texted me saying I was wrong to be so upset and she shouldn’t need to ask for my written permission to post something. She also said have a nice life with my new child. Is there something I’m missing?