I Was Just Trying To Stop the Main Characters From Breaking Up

In a romance novel full of shoveling and misunderstandings, she possessed the male lead’s younger sister. Falling into the novel, I stepped forward to continue for a frustrating couple of main characters, but on the day of the engagement, the main characters declared their breakup! And at the center of it was the heroine’s older brother, ‘Eiberg Raphael’. The monster Duke, Eiberg, was quite a ‘siscon’… “What is the duke’s ideal type?” “A woman with red hair and eyes resembling a blazing fire, who does not flinch no matter who is in front of her. Alas, now that I say it… you look like my ideal type.” I was just trying to stop the main characters from breaking up their marriage, but did I seduce the heroine’s brother without realizing it?