I think it's no secret that Haytham and Ziio were in love. And I think the amount of homo Charles gives off for Haytham is simply off the charts. So what I want is this: Charles has been pining for Haytham for who knows how long, obeying his every order, chasing after that elusive Native woman, doing EVERYTHING for him, only for Haytham to 'betray' him by sleeping with Ziio. Then one day, the Templars get drunk off their asses, and Charles convinces a completely stoned Haytham to sleep with him. Haytham agrees without really knowing what he's doing. The next morning, Charles wakes up and sneaks away, all guilty and stuff for taking advantage of Haytham. The Grandmaster himself wakes up sometime later, pieces the events together, and realizes what's happened. How his takes it is up to the author.

Bonus points for:
- Uke!Haytham. Because it has to be done.
- Haytham mentioning that it's not his first time with a man; Reginald Birch slept with him when he was converting him to a Templar.
- Charles trying to deny everything/acting like nothing happened

Come on, all you Charles/Haytham shippers! It's practically canon! Let's give it our best shot!