Responses
I can only assume that he put things together himself and knows that it's Duke Bailey who is targeting FL, perhaps the butler even told him outright. So he might just be playing nice for the sake of FL's safety.
Whatever he's signing with the Duke rn, he's so gonna screw them over regardless and then do whatever the hell he and FL feel like doing in the end.

So the ml wants her to live her whole life pretending to be someone else won't tht be cruel?