Behavioral Issues 8 year old

I have an 8/f who is going through a lot right now. I got married to her step dad when she was 5 years old and they had a wonderful relationship. Then we brought our younger daughter into the world, who is currently a toddler, and my 8 year old is still jealous of her. Her biological father abandoned her for 5 years, came back for a year and a half, ignored her for 8 months, has lied to her, and has manipulated her. Going through family court with him. Now because of this she treats her step dad, who has been there since she was a toddler, like absolute garbage. He is made to feel like he can’t be silly or love her. She sees a therapist every other week, and she is on medication for ADHD. She is a good kid compared to what most kids are these days. She makes straight A’s, is polite, and is friendly. For some reason refuses to listen to the point of putting herself, her dog, and her little sister in danger. She goes from happy/sad/mad as if flipping a switch. We cannot talk to her calmly about issues with her without her running off, hiding, and crying. When she gets presents from family/friends she is disappointed that is all it is. She gets an ungodly attitude about random things. Like the house being a little cold. She’ll blow up. When disciplining her we try time out, grounding, taking stuff away, talking it out, writing out the problems, writing sentences, and so much more. Nothing works. She seems to get worse and worse. When we talk to her about her issues and her body language and attitude is she doesn’t care at all. As if nothing is phasing her. When she is good we go to the arcade, movies, shopping, the park, and out to eat. Though as soon as we do something good and fun she ruins it by going straight back to her crappy behavior. My husband and I set out one on one time with her daily. Him and her watch a tv show they like together. We read Disney stories and try to sing the songs that go with those stories. We do stuff with her without our youngest. Yet, we go back to square one; as if what we do is never good enough, and she is still just so angry and sad. The therapist says what I am doing is what she would recommend, but I feel like it is not enough because of how she is still behaving. I am at a loss of what to do for her. I feel like damned if I do; damned if I don’t. What more can I humanly do? via /r/Parenting https://ift.tt/2SvJgCw