So I’m genderfluid, and I was planning on coming out June 1st on Facebook to extended family. And my mom told my grandma and aunt without my permission. And she gave them the wrong meaning of genderfluid. And they were the people I was most excited about telling and she took that from me. Then my grandma outed my cousin as asexual. I’m glad to know that there’s another asexual in the family but that wasn’t for my grandma to tell. I’m just pissed at my mom right now because coming out was my thing. I’m the one who is supposed to do that, not my mom. It’s my thing to tell not my moms. She robbed me of a perfectly good experience. I just- I can’t even look at her right now. I knew my mom didn’t understand or accept it but for her to out me, that’s just- that’s not okay.
No it’s not ok, I’m sorry for the violation you must feel. She took part of your story away. I think the best thing you can do is to take a moment and breath. Then contact your grandma and aunt so you can say to them what you wanted to say and take part of your story back. When you can look at your mom with out anger then talk to her about how she hurt you. Lots of hugs and love. 
I’m so sorry. I certainly can’t understand what it’s like to be “outed” by someone else…even if possibly it was done from a good and loving place…I do know what it’s like to have family members share MY life on Facebook. My sister does it all the time. She’s a proud Auntie and I can appreciate it, but I’m so fed up with stories that we’re MINE to share being shared by her first. Plus SHE often gets the “congratulations” and the “Im so sorry” responses rather than me or my kids. People really need to learn wait and only talk about something AFTER the person in question has shared first.
But I do hope that your mom shared because she’s happy for and proud of you. I’m happy for you.
I’m so sorry! I hate when people are outed by others so much. Its your story to tell, not your moms. 
On a much, much smaller scale, I had a coworker tell everyone about my full name change (I changed my full first and last names) before I had the chance to. I really wanted to do it in a fun way and he ruined all of that.
When its something as big as a gender identity or sexuality, it’s just horrible to do that to someone.
That sounds so frustrating, I would have been upset and disappointed as well. It is unfortunate that your Mom took this experience from you. I hope you can still do your FB post / calls/ visits to discuss what you want and need to with friends and family, especially to educate your Grandmother. And hopefully once you are able, you can discuss with your Mom your disappointment, anger and frustration at her sharing what is not hers to share. This could be a good learning experience for your family about boundaries and respect.
And congratulations to you for making your decision to come out!! 
