Catching the nod of her head, Sam pressed a hand against the bed beside them and began to travel down the length of her body. He kept his mouth close to her as he moved - it was almost a tease, really - looking very much like he was about to drop down and ravage her at any second. He wanted to. If only because he needed to be as close to her skin as possible, knowing that the blood was happily waiting for him underneath it. Yet in order to get the blood from her, Sam had to slice Ruby open. His teeth would only get him so far, as much as he did want to just bite her and get a taste, so Sam dropped down to the end of the bed and wrapped a hand around her ankle. He lifted her foot up and slid a hand into Ruby's boot, quickly dragging the knife from the place in which it had been tucked away. Lifting it upward, Sam eyed the knife briefly before he began to clamber back onto the bed. Whatever Ruby was thinking and feeling right now didn't matter. She knew that he needed this. They were both well aware that if he didn't get it soon, he'd go mad or be worse off. The blood was turning on him. It was providing that power he so badly needed, but it was also demanding that he pay it more attention. Sam wanted to blame Ruby for it - it was her blood after all, why couldn't she just make it cooperate? - but he knew that was illogical. She had as much control over her blood as Sam did himself. Possibly even less.
Snatching up Ruby's wrist, Sam pulled her arm out along his half of the bed and, with a shaking hand, he pressed the blade of her knife down firmly against her skin. Running the sharp edge against her flesh, Sam split Ruby right open, a rush of satisfaction flooding through him when he caught that first glimpse of red spilling onto her arm. Tossing the knife onto the floor, Sam jumped for her arm and quickly bit onto the wound. The rush of adrenaline that followed was enough to make him moan into her arm; he hadn't felt this good since his last real fix. Even that was questionable, since this was coming straight from the source. Everything else just sat for a while - it didn't taste as good when it wasn't him here, drinking right from Ruby herself. He'd found himself wishing more and more that their little demon in his pocket joke were true. That way he'd be able to have demon blood fresh from her whenever he damn well pleased. But now, none of that seemed to truly matter. He had the blood and, fuck it all, Sam was going to drink down every drop he could without severely putting Ruby down in the process. Greedily, Sam sucked at her arm, refusing to let a single bit of it get past him as he did so. No, he wouldn't waste a drop. All of Ruby's blood was his. Possessively, Sam wrapped his arm around her own, the other still pinning Ruby's wrist down to the bed as he drank. Sam tightened his grip on her, looking for all the world like a wild animal trying to keep Ruby's arm pinned down while pulling it to him at the same time.