"I came here with some people," Sita admitted. "I can't really leave without them." The guy could probably take care of himself, but the girl who'd dragged them here... Well, if she got really drunk and something happened and Sita wasn't there to help, she'd feel awful later. Wasn't that one of the requirements of going with someone to a party? You watched out for them. Even if you didn't want to be there.