This seems to be working just fine

You don't pause for a moment as Cindy shudders in orgasm. That does not stop her from moaning redundant encouragement at you. "Fuuuuck! Keep going!" You do as you're told, switching back and forth between using your fingers and tongue to fuck her. You've got her wrapped around your finger in more than just the literal sense. You have total control of the situation as you lead her from one orgasm into the next, and shortly after the next one.

"Oooh, st- stop! I need a break!" She is completely out of breath, and her skin is glistening with sweat. Perfect. You don't give her that break, obviously. What would be the point in that? Instead, you redouble your efforts. Cindy is practically screaming by this point, and you worry for a moment that the neighbors might be starting to get worried. Then again, given her reputation, they're probably used to it by now.

Cindy is pulling at your hair and rolling from side to side, but doesn't actually seem to be trying to stop you. Finally, you decide she's had enough and crawl your way back up her body. She hugs you and wraps her legs around your waist as your lips meet again in a passion-filled kiss. Cindy has to take occasional breaks to catch her breath, but more than makes up for it with her enthusiasm. You, meanwhile, are grinding your crotch against hers, although your pants are still on. Just as you promised.