Mother in law has a big mouth!

Okay I need yall's opinions please! I've always had a great relationship with my mother in law. My husband and I have had 4 miscarriages and are finally blessed with a (so far) healthy pregnancy. We're both so excited but didn't want to announce publicly too soon. We've told all of our parents/step parents and a small handful of close family and friends. When we told these people we adamantly told them please do no tell anyone! My mother in law has since told 2 people (well she claims only 2 but there's no telling how many she's really told) AND shared/tagged me in an expectant mother post on Facebook. I was caught off guard and furious and told my husband to please call her to (nicely) tell her to un-tag me in it until we announce to everyone. She got upset and started playing the victim. That resulted in my husband feeling guilty because she made it seem like he hurt her feelings. He then tells me she's just excited it's not her fault. My question is, what should I/we do? How do I face her next time we go visit her? I just feel a little disrespected. Thanks in advance!