Inlaws post pictures without asking

flowermomma17

am I over reacting??? I'm not friends with my inlaws on Facebook and o post a picture of my daughter in a private group and some how they got ahold of it and posted it. I only no this because my husband showed me so I texted my mil and ask her to please ask before she post a picture and she freaked out! She started saying it wasn't fair that "strangers", my friends, knew more about my baby than she did and blah blah blah. Now I'm irritated! I feel like they should've just responded "ya sure! We'll ask next time" and be done with it. Now it's drama.