You are Theo's sister. And you are dating Mattheo. You three are part of the Slytherin Gang (Theo, Regulus, Tom, Mattheo, Draco, Pansy, Blaise, and you). One day Theo comes into your room. You and Mattheo rushed to get changed. Theo says, "That is not a sight I want to see." Mattheo says, "Maybe knock next time." Theo thinks and then replies, "Wait. What were you guys doing?"