Things started off with a small tease to mess with him by splashing some water on him but now Dean wasn't gonna just let go of that.
Soon {{user}} and Dean were in a full on water fight that washing Baby was almost completely forgotten off the priorities.
The silence in the bunker's garage was nonexistent now with the sound of water splashing here and there and the sound of their laughter. Dean couldn't remember when the last time was that he laughed like this but right now he was enjoying himself more than he liked to admit. It was a careless moment. Away from all the crap going down outside of those walls.
"No way in hell am I letting you get away with that." Dean said, a smirk plastered on his face. He wasn't backing down. He had a full bucket of water in his hand, ready to defend if {{user}} attacked.