My stepdaughter from hell....very manipulative and unappreciative?

Sometimes her visits here are ok and most are not. She is adopted from China and her mother left her father for another man a year after they adopted her. I married her father 5 years later. She is borderline dangerous with her manipulation and is extremely jealous...regardless of the consistant love and support she gets and the counseling. She is VERY spoiled and empowered by both parents. Anyone else with an adopted stepdevil?????