My mother-in-law announced the news of my pregnancy on her Facebook page, before I even told my closest friends. I am so angry with her. My husband says i should let it go. How should I handle this?

Right after we announced our pregnancy to our closest family and friends, me and husband already warned them about announcing our pregnancy during the 1st trimester. We told them that we want to share about it when it reach 2nd trimester. Luckily they understand. But somehow other people seems to have quick pickup and sometimes they asked the families. The families just answered "yeah they conceived but actually we want to keep this secret coz it's still early. Sorry didnt tell you earlier" and they will understand.