Taylor says she drinks hard liquor every weekend until she "feels it," and smokes weed and her e-cigarette every day -- and she says she's not going to stop. But it wasn't her mother, Kim, who emailed about Taylor; it was her 19-year-old sister, Madison. She claims their mother is an enabler who picks up Taylor from parties at 3 a.m. and gives her everything she wants, even when she punches her. And every time Madison tries to step in and be the parent, she says she gets yelled at, punched, shoved and has even been threatened with a knife by her younger sister, who she calls "unruly, ungrateful, and disobedient." Their father, Troy, has given up, and their mother says she doesn't know where she went wrong. Will Dr. Phil help this family figure it out?