If anyone ever said being an adult was easy, they hadn't been one long enough.Diana Casillas can admit it: she doesn't know what the hell she's doing half the time. How she's made it through the last two years of her life without killing anyone is nothing short of a miracle. Being a grown-up wasn't supposed to be so hard. With a new house, two little boys she inherited the most painful possible way, a giant dog, a job she usually loves, more than...