Dean's grin grew tenfold at her 'threat'. "Maybe I want you to persuade me." Not that it would take much, but it didn't mean he would stop what he was doing. With a shift of his hand he pressed his thumb against that delicate bump, wiggling his short nail against the bundle of nerves. All while he pressed his finger in and out. Savoring how wet she made it. How wet he made her.
He pressed his lips to the closest part of her. A moan purring past them. Already he could smell the sex in the close quarters. And it was hot. Looking up at her he grinned against her skin, before murmuring "Do your worst baby." It was almost a dare. Fuck the rules, there were no rules in his car.