We've had the other way around, so now I want one where Haytham and Connor are doing the deed (who tops and bottoms is anon's decision, but it would be the icing on the cake if Charles saw Haytham bottoming for Connor) and Charles happens upon them. He probably gets turned on by it, but is incredibly pissed off about it at the same time, since he's clearly had the hots for Haytham since the beginning of the game.
Connor/Haytham with Charles watching