Right here...

As you pull over to the side of the road into a less than busy part of town, she gets a mischevious grin. She knows what to do. Stroking your stomach, she puts one of her tiny hands down the front of your pants deftly and strokes your cock through your underwear. Pulling them aside, she starts jacking you off under your pants.

"Ooh, you're big," she says with a smile, licking her lips, "and so hot. You must be real horny..."

As you nod, she smiles more. Unzipping your pants, she pulls your cock out and gasps.

"You're real big, I'm gonna have fun with this..."