God, it was through sheer force of will that Sam was holding on to even a tiny shred of self-control. He was so worked up, with Dean doing this to himself because he'd asked, with Dean's mouth, with everything that it was hard to believe he hadn't come yet.

He worked himself open quickly, not caring if it was enough or not, really. It'd do and he needed to feel Dean, wanted to see his brother's reaction underneath him. "Dean- stop. Enough..."