![](https://pic1.mangapicgallery.com/r/avatar/59/u96160_50x50.jpg?2)
Just like most deception, she joined with an ulterior motive, a spy, and she was there to bring down the Duke cuz he was 'evil' based on rumours. That's kinda hard to reveal cuz it'll the ruins the Duke's trust, even more so now that he loves her. It's kinda terrible if your lover's whole identity is a lie. She can even get killed for being a spy.
![](https://pic1.mangapicgallery.com/r/avatar/db/u267353_50x50.jpg?2)
Which is what makes it even more frustrating that she’s waited this long. To be honest I really don’t see much of her progress as a spy and it’s mostly been developing a relationship between her and the duke. If it was heading towards that direction, she should’ve either left from the beginning or stopped it before he fell in love.
This is stupid. There’s zero reason to still be hiding her gender