OgFL- is ML's adopted daughter and Villain's biological daughter.

OgML- is FL's son.

Both original ML and FL love each other as a family in the current novel.

The Emperor- abusive father and Main villain. He and ML are blood relatives.

The first, and probably the more interesting part here is the fact that the FL is the adopted daughter of the archduke. But not some random girl he grabbed out in the streets. She is the daughter of the emperor. Brother of the archduke.

And it looks like the whole "The emperor is crazy and keeps making his brother's life difficult" plot point will rise. This will surely add some good drama and tension. Even more so when he uses his blood daughter as leverage against the archduke.

And, related to that, the fact that the archduke was considered the best for the throne, but was pushed out by his crazy brother and that there is a chance that the brother should not be on the throne (something added just now on the story), makes it looks like things will get complex.

But now let me talk about the fun part.

The husband cheater is a brainlet. No. It would be better to say that his brain is like a romantic delusion mess. He is the type that lives in his own delusions. In the sense that he believes that he was forced to marry who he didn't love, and is the one that suffered the most in the whole world by being denied of his real beloved. A true martyr. Someone unable to understand how much of an imbecile he is. Or how much trouble he puts himself over because he can only think with his peepee.

The cheater 2 is similar to him. But her falling back to earth was very satisfying. By the way, that type of thing is my jam. But when she finally noticed how things were wrong, and how much of a brainlet cheater face was, things got even more interesting.

There are some more things that I could talk about, but it would be mostly about the cheater's parents. Nothing would come from that, really. Reading it would be so much better that I will end this spoiler section here.