"You're being over-dramatic," she sighed. "Just because we weren't exactly like that when we were that age because we... clearly had other things in mind, doesn't mean that this isn't normal kid behavior. You have a sex life. I have a sex life. I'm... not sure Rose will ever have a sex drive, but you do see my point. It's time to stop thinking about them as kids and start thinking of them as adults. As... much as that worries me, too."
Hermione would have been lying if she tried to tell him that she wasn't just as concerned as Harry was. But that was hardly the point right now-- now was the time to be a good friend. That mattered more.