And you do fuck her, but you take your time, enjoying every second of it.
First you feel the blissful entry to her pussy over and over again. Then you stroke harder, rubbing her G-spot from within her pussy with the tip of your cock while you use the base of your cock to tease her clitoris on every stroke.
She gets very excited, gasping for breath, and telling you "Yes! Yes! Fuck me harder! Harder!" over and over again.