V.C. Andrews 
Cat [EPUB ebook] 

Lying about her past seems less horrifying than revealing her darkest secrets…Cat had listened patiently as the other three girls in Dr. Marlowe’s therapy group shared their innermost feelings. They had described their broken families honestly, to the point of pain. If Cat doesn’t tell her own tale, the others will see it as a betrayal. So she has no choice. Or does she? Maybe she could liejust make something up. Anything would be better than the truth. For Cat has the darkest, most horrifying secret of them all…