Cause for Alarm book by Erica Spindler

Nineteen-year-old Julianna Starr has chosen Kate and Richard to be more than the parents of her child. Julianna knows that Richard is the man of her fantasies, the one she's been waiting for. As tormented Julianna begins to mould herself in Kate's image, she insinuates herself into Richard's life, determined to tear their perfect marriage apart and have Richard for herself. But for Kate and Richard, the nightmare has only begun. Because Julianna is not alone. From her dark past comes a man of unspeakable evil Published By Mira Books on 2008-08-01