sibling drama!

Sorry for the long vent in advance. 
My sister and I are close in our pregnancies, only two weeks difference. 
She announced she was pregnant to everyone when she was only 6 weeks. I said we were waiting until after 12 weeks, and have a plan on how we want to announce. 
She comes back with telling me they want do an official announcement too, so I said I would happily wait until after she announces. No big deal. I said I'm doing mine early October with pumpkins and my son involved. 
What does she do this morning? Announces her pregnancy, with pumpkins, and her oldest.
Awesome. She's always doing this, and I'm hitting a breaking point here.