He fucks Emma while she leans out the window.

Scott likes your girlfriend, a lot. He knows from her temperament that she's clearly not a one-man woman, which suits him fine. He's not a one-woman man, after all. But more than that, he's almost jealous of her freewheeling ways. He feels like it will be a fun challenge to see if there's anything she won't do. While he caresses her naked breasts with one hand, the other hits the switch to pull down the car's tinted windows. He signals the driver to slow down and find a pedestrian road where they can drive near the sidewalk.

Sunlight streams in over Emma's naked body before Scott roughly manhandles her into position, kneeling on the seat while her face and tits hang out the window. Emma makes no pretensions to modesty, catcalling various passersby about the size of their dicks. As Scott positions himself and starts fucking her from behind, she smiles and grits her teeth, panting and grunting out loud to let everyone around her know what's happening.

"This dick inside me feels so hot! Don't you wish you could fuck me? I'd let you come right up and use my tits to jack off with! Mmm, I can taste that cum!"

Scott can't believe what he's hearing. He speeds up, spurred by your girlfriend's shameless filthy mouth. Emma doesn't keep it a secret. She half-moans, half-snarls as he digs out her throbbing pussy, trying his hardest to stave off pumping a load inside of her. By now, your girlfriend is lingering at the edge of orgasm, lolling her tongue out for the benefit of every phone pointed in her direction.