I was a right little "bizzom" at that age. But they DO grow out of it, and should, in time, beccome friendly again.
I was mean to my parents when we emigrated to NZ when I was 13 - leaving behind all the friend I had just made at secondary school, so I sulked for a year. Made a great new circle of friends in NZ, but then my parents (after 2 years)decided to come back again!
Second time, at 15, I was EVEN BETTER at sulking, which I did for ANOTHER year! More sophisticated about it too, so I would do things that I knew would hurt, but that I couldn't get into trouble for. Things like stopping givng them a good night kiss (OK, I'd have grown out of it anyway), refusing to walk down to the shops with mum, little things. I was a right wee madam.
I only really "came out" of it fully when I went to Uni (at 17) - although I had been pleasant enough for the previous year. What "did" for me finally was when Mum & Dad were having some real problmes with my brother and I decided that they really were pretty good parents and that maybe I should show them that I thought that!
Just be there for her, keep giving her opportunities for "family" time - but without big ultimatums - and I'm sure she will come through it.
Yes, she's had some bad times with her bio-dad, but it sounds like you and your dh have given her a good, stable and loving foundation which WILL stand her in good stead. And you've also got some great friends for added support! :)