Nobleman (golden pantaloons)

The Pantaloons Nobleman, referred to only as Nobleman in game is found in the 3rd floor of the Friendly Arm Inn. He mistakes you for a servant of the inn, and entrusts his pantaloons to you for cleaning. Will you keep them or tell him of his mistake?

He can be killed to retrieve pantaloons after given back to him, but killing him results in reputation loss.