What does Lacey want when she approaches Q at school?

When Q returns to school, he is stunned to find Lacey Pemberton, the beautiful ex-friend of Margo's, walking up to him. Q is hanging out with his friends. She says that she heard Q was with Margo and Ben admits that he was. Lacey asks why Margo was "pissed at her" and Q explains that Margo thought Lacey knew about Jase. Lacey however explains that she didn't know.