Am I overreacting?

Possible trigger post.

Sorry for the length but I need to know if I'm overreacting or if this is something my daughter needs help with.

Miss 9 and I were separated for 7 years only recently reunited by interim orders, my daughter was subjected to an alcoholic father and both he and his mother are heavy drug users, my dd was moved around alot and was sexually abused by a "family friend" for 4 or so years.
In the few short months she has been back in my care I have noticed her bite my young baby several times, she has nuzzled at my breasts and taunted the baby that she's "stealing her boobies" she's sat close and cuddled me and then proceeded to give little light kisses on my ears/arms/shoulders and on occasion my legs if she can't get close enough to the top half of my body.
3 days ago I delivered the news that our final orders were made and that she is now living with me permanently, these above mentioned behaviours have increased, she's stuck to me like glue even when I've made it clear I need a little space.

Should I be worried?
She has a child physcologist she sees on an irregular basis (school holidays saw a big break of 5 weeks between appts)
Please help me make sense of this