Sam's fingers dug into Dean's back, blunt nails raking at the skin there as he held on. God, he couldn't even focus on anything besides the way Dean pounded into him, the way his cock stretched and filled him in a way entirely different from the toy. He was gasping and panting, small groans leaving him.

He moaned at Dean's words, tipping his head back to meet his eyes, expression twisting up a little, but far from anything like pain. God, even if he wasn't hard, it was worth it, it was amazing to feel Dean, to watch his brother take him like that and feel it. "Yes... oh, God, Dean." He shuddered, biting at his lower lip.

"Please... yours, Dean... how's that feel--knowing I'm all yours?" He managed, leaning up to press his lips to the other's ear. "Knowing you can do whatever you want to me, whatever filthy, nasty things you want, and I'll love it because it's my big brother doing it... how's that feel?" He nipped at his earlobe.

"And then to know I'm gonna turn around and do whatever I want back to you because you're mine... all mine and I won't let you go."