I'm stuck on Ms. Potts' quest where the quest guide says to "wait for the twins to get in trouble". I've already gotten the school board meeting scene where Ms. Potts suggests stripping the twins naked for all the other students to see. The headmaster said he'd punish them after school on that day, but nothing happened on that day. Just the same regular options to call up specific girls for punishment, but nothing with the twins. Is my game bugged? Is there something I'm missing? I have no other quest items to do.