Dean is leaning against the wall in the drabby hospital room, watching as Sam struggles to stay awake. Dean pushes off the wall and walks over to Sam's bed. He props himself up by his brother and pulls him into his arms, laying Sam's head on his chest, positioning him over his heart. Dean starts stroking through Sam's hair and periodically leaving kisses to the crown of his head. He whispers soothing words, trying to coax Sam into sleep, "It's ok Sammy. I'm right here baby boy. Remember what I told you: as long as I'm around, nothing bad is going to happen to you."
Sam gets lost in the comforting words from his brother, forgetting for a moment where he's at. He clenches his hand in a tight fist in Dean's shirt, trying desperately to hold onto that promise. He can feel his eyes start to grow heavy, but he's afraid. Tears form in his eyes and he sobs brokenly, "Dean, I'm scared."
Dean is trying everything to take away his brother's pain. He keeps whispering and stroking softly, wishing he could take on his brother's burden. Subconsciously, he starts humming 'Hey Jude' into his brother's hair as a single tear falls down his face.
Sam's tears are flowing freely now as he listens to the gentle humming vibrating through his brother's chest. He finally lets his eyes close as he listens to the gentle humming, coupled with Dean's heartbeat, as it lulls him into a desperate slumber.
Dean finally felt his brother succumb to the sleep that he so desperately needed and let out a relieved sigh. He kept up his gentle ministrations as Sam slept peacefully. He rests his own head on top of Sam's and murmurs into Sam's hair, "I'm gonna find a way to fix this baby boy. Everything's gonna be alright, I promise." He kisses the top of Sam's head before he too succumbs to the darkness of sleep.
