Julian gives Diana skates. Jenny, consumed by envy and jealousy, has no understanding for this benevolent gesture and spins an intrigue with which she wants to incapacitate the competitor; Meanwhile, Diana's hip stepsister Nina meets Tim for the first time - and is enthusiastic about him. Vanessa hits this like a blow and while Tim tries to find out all the important details about Nina, Ben and Vanessa get into an argument because she doesn't want to see that Tim may not be interested in her at all. Meanwhile, Nina takes advantage of Diana's absence and spreads out in their shared room; Grandpa Lutz is so upset about the confused family conditions that he suffers an attack of weakness.