She is... manipulating you... and knows it and it works.
She wants attention by getting it by negative means, and manipulation.
Per her conditions, is she seeing a Therapist?????
If not, then she NEEDS one.
AND the Therapist will give you tips, on how to handle her and per her condition.
And, as well as just how to handle a child, issues or not.
If she uses emotional means, to manipulate people and it becomes an entrenched habit... this is not good, for her. And others. And it will become... a vicious cycle of behavior.
A negative AND DYSFUNCTIONAL cycle of behavior.
She needs to learn, positive and healthier... "coping-skills."
When my kids try and manipulate me, I just CALL them on it.
I tell them POINT BLANK... that I know what they are doing and it WILL NOT WORK. They can cry or tantrum or scream, it will not work.
They know better.
AND... I will go and sit down and read my magazine, until they calm down, then they can tell me when THEY feel better.
I also TELL my kids, IT IS A CHOICE.... they can act this way, or not. They are old enough.
The bottom line is: IF you keep LETTING her act this way... she WILL continue to act this way. And it will become highly dysfunctional and not good for her... at all.