Kate Fuller ain’t perfect, kiddies
The first time we meet Kate she is barely holding her family together. In fact, Kate is so convinced her father killed her mother that she calls up her insurance company and impersonates a secretary to get confidential information about her mothers accident from their insurance records. She then decides that she’s going to sneak off with her boyfriend and abandon her family on a road trip. When she meets Richie, she asks for a cigarette because it was her way of rebelling. She even says she’s not a smoker but she’s pissed at Jacob because she believes he’s lying to her. So she does what any teenage girl would do and smokes with the random guy chatting her up who clearly has a thing for her.