Ruby let out a tiny yelp as Sam flipped her around and dropped her on the hood of his car. It wasn't exactly comfortable, but they were rarely all about the comfort. There were times when it wasn't rushed and rough and it very well could be romantic now and again. But now wasn't one of those times. Right now it was pure physical need. Need. Ruby needed Sam to pin him to the hood of his car and fuck her like he wanted to break her in half. She wanted him to try and break her in half. Needed it. Her body was as addicted to him as his was to her.
With her shirt out of the way, Ruby yanked her pants over her hips and kicked them aside. The hood of the car was warm against her ass, indicating Sam had either just gotten back from somewhere or had been running it while doing whatever he was doing to the engine. She didn't particularly care at the moment. Her thoughts were on how she could make him touch her without getting in the way of their getting naked as quickly as humanly possible. (Really, with all the power between them there should have been a quicker way to do this, but so far they hadn't figured it out.)
Of course, Sam didn't think people fucked on cars, but Ruby knew better. Just because Dean was too obsessed with his to smudge it with naked bodies didn't mean everyone was. There were tons of people who had sex on and in cars. There just weren't a lot of people who did most of the other stuff they did in the bedroom. The dark BDSM underground, maybe, but Ruby was willing to bet that even they didn't participate in the exchange of blood like she and Sam tended to do. And normal or not, it was definitely worth it.