"We'll keep it down."

"Sorry about that, Kelly, we'll try to keep it down."

Kelly giggles, and says, "Thanks, I don't want the whole building masturbating to your sex sounds. I mean, it'd be hot, but I'd be the one who'd have to clean up after everyone."

You laugh, and say, "Sure thing. Talk to you later, Kelly."

"Bye John." Click.

You're pretty sure you could've gotten her in on the fun, but you've still got all day tomorrow and the following day to make that happen.