He gives her a simple order

"When you are ready Flis, I'd like you to cum for me." His voice is calm and level, yet another simple request made as if it were the most normal thing to ask for. Even as he speaks, he doesn't even look towards her, keeping his eyes on the road ahead without pausing. Even so, the words make her feel a new need inside, a need to do as he requested of her. Her fingers continue their work, sliding in and out of her wetness, wetness that she can now feel running from her body, down her thighs, beneath her and over your ass and onto the car seat. Soon enough a second finger joins the first inside her, pressing together, stretching her opening gently wider.

"Good girl, good girl" he whispers softly, glancing her way briefly before returning his gaze to the road. "Tell me when you are about to cum" he adds after a moment.

"Yes sir" she gasps, realising how close she has suddenly become, not just because of the way her fingers are working her body, but also because of the thrill of pleasing him, doing something so naughty to her. As her fingers work in and out, drawing more wetness with them each time, her hips and thighs gyrate on the now wet seat. Her breathing deepens and her awareness of anything outside of her own body becomes non-existent, now hardly caring what she is doing or where, only that she needs to cum for him.

"Oh god, oh god, yes, yes, I'm so close" she pants as her fingers find a new pace against her pussy and clit. "Fuck, oh god, it feels so good."

"That's it young lady, let it out, I want you to cum for me." His own voice is not now as calm and soft as previously, instead there's a slight breathlessness to it, the only sign he has given of how much pleasure he is taking from her performance.

"Yessssssss" she screams out, her orgasm hitting her almost as soon as the last word had left his lips. Her hips buck wildly, lifting high off the seat, her legs stretching out into the foot well in front of her. Her fingers **** themselves deeper between her spread thighs, holding inside as her body spasms around them, her pussy shooting intense shocks through every nerve ending of her body.

She remains lifted high off the seat as the sparks of her orgasm course through her, causing little shivers that make her body jerk and quiver. Until finally she collapses back down, her ass meeting the seat and finding it soaked beneath her, a wetness fully of her own making.