What is the result of Rose and Mason starting rumors about Mia?

When Rose and Mason try to start rumors about Mia at the dance, it backfires on them. Mia hears the rumors and thinks that Lissa has started them. She confronts Lissa, and reveals to everyone at the dance that she has seen Lissa's medical file, and knows that the real reason that she was in the clinic is because she cuts herself.