Oh dear, now that's an idea, albeit a potentially bad one. "I don't think it'd be a good idea to um, well, show up with you tonight, like that?"
Yes, that's what's on her mind too. But the funny thing is that as time goes on, she's less and less likely to act on her thoughts and desires like that, even if she did have permission this summer.
Now how to steer the conversation back towards something relatively safe? "So um, how've you been?"