Sure she will! I've had some very young buff orps go broody before. I think that means she's going to be a great mom. Nonetheless, this is a first time for her so if you want those eggs to hatch, keep an eye on her to make sure she's up to task!
Yea i went to get eggs and she was sitting there
I bumped her off but left the eggs and she went right back in less than 2 minutes and has been there all morning
She was also sitting there yesterday
So I assume thats what she is doing