Lean over and start casually fingering Helen's pussy

You push two fingers up to the first knuckle into Helen's snatch. She freezes for a moment, but before she can say anything, you point to the remaining pizza crumbs.

"Over there," you say. She looks at you for a moment. You keep your expression carefully neutral. "You got it all, except for the spot over there," you helpfully add.

For a second you hold your breath, then she decides to finish cleaning up, and you dare to move your fingers about a bit. She's temptingly warm and wet.

Then she's done cleaning up. What do you do?