Bridesmaid Q- Kinda long but I NEED advice

Ok so I have this girl that I was friends with growing up. She lived across the strett from my bff and we were all the same age so our parents made us play with her. She became a good friend and we were friends through hs. After losing touch for quite a few years, we've been in touch lately and see eachother every few months or so.
So anyways, yesterday she told me through text 'I better be in your wedding party'. I laughed it off and said we weren't picked until our e-party. Then she said it wasn't a question, it was a threat. I still laughed and she was like- 'no I'm serious...'.
It puts me in a very weird spot.. I wasn't planning on asking her to be in my BP. She's kinda the 'where I go, drama follows' type. I totally don't know what to do and I feel like she just wants to be in so she can tell people 'yeah, I'm in joanna's wedding party'. (ps- s4 years ago I found out she told ppl she was in my sisters wedding party and she wasn't even invited to the wedding!)
SORRY so long but please helppppp! TIA!

I think if you didn't want her in the party, from the beginning, don't ask her. I ended up only asking my cousin to be my MOH and to have no bridesmaids. I have heard that some of my friends are upset about that, but it is our wedding and I did what I felt was best.