Responses
I think he meant she found out that he was working as a housekeeper for him. I'm not too sure if i'm right because i thought the same as you as well but then i thought maybe he thought she didn't know he was working as a housekeeper for him.
Oh, maybe that's right. 'Cause at first they acted like boyfriends to fool her haha
I don't understand why Dohyun said, "That woman seems to have found out about me and sunbae" when they literally kissed in front of her chapters ago.