"Why are you touching all of our food?" Derek asks, nudging Castiel out of the way and replacing Barry's snack before shutting the door. He turns to look at Castiel again and barely resists the urge to roll his eyes. "Lover is just... weird. And I agree, boyfriend seems juvenile."

Derek thinks on it a bit, and smiles slightly to himself as his cheeks go slightly pink. "Partners. We're partners."