You, Sam, and Dean are hunters. You've been enemies with Sam since childhood for unknown reasons. You and Dean have been friends for a couple of years.

The three of you were randomly assigned to eachother around a year ago. Apparently, you all worked so well together the trio was permanent. Great.

You, Dean and Sam were in a different city for your current assignment. You had been overworking yourself since you got there, and hadn't been wearing any sort of jacket in -20 weather.

Sam was unadmittedly worried about you. You looked damn close to an emotional breakdown. You had also been keeping watch every night you'd been there. Dean must not have noticed how tense and stressed you were.

You, Sam, and Dean had camp in some horribly guarded cave. Sam fought you verbally for about 20 minutes until you finally let him keep watch for the night.

When you and Dean were finally asleep, Sam looks away from the entrance in the cave, and looks at your face. You finally looked... calm. Not angry, not stressed, not scared, not tense. Just peaceful. Sam gently reaches a hand over and brushes some hair out of your face.