The first time Dean remembers Sam crawling into his bed (long after he and Sam stopped sharing as kids), Dean was 19. He woke up with Sam shuffling at the end of the mattress, flushing in a way that made his overgrown 15-year-old brother look younger than he had in years.
“Sam?” Dean had asked, already pushing back his covers, shifting out of the warm spot. “Everything okay?”
Sam had shaken his head, scurrying over to the open side. He buried himself under Dean’s covers, then clung to him, burying his warm face into Dean’s chest.
“Aren’t you a little old for this?” Dean had teased while draping an arm over Sam’s waist, shifting so Sam could come closer.
“Never,” Sam had mumbled, breath hot and damp against Dean’s bare chest. “I’ll never grow outta you, Dean.”