
Well his plan is probably to become a king regent.
1. He killed the previous empress (to possibly make the emperor get depressed)
2. As the prime minister he can control the court (if the emperor is not present)
3. He forced his wife to have a baby so he could have a daughter to pair with the young crown prince.
4. If Astelle & Kaizen have a successful marriage and got a kid. He can get rid Kaizen so his grand child (Theor) will become the emperor.
5. He probably plan to use Theor as puppet emperor while he was the actual ruler behind.

Spooiiilleeeeeer
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(づ ̄ ³ ̄)づ
Σ(っ°Д °;)っ
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No....
1. Big brother - You can read it on the chapter where the father read the diary of her mother that is locked away in the drawer. It said, that when the lover and mother got separated, she got pregnant already. And "fortunately" the evil father proposed to her and she proceeded with it.
2. FL - here I'm not sure, but it actually is implied? This one is during the time when FL read the diary of her mother given by the lover in prison. It said that the evil father decided to keep on sa the mother because he wanted a daughter. Then the mentality of the mother got worse, but improved when she and the lover met again.... Then they stopped meeting when mother got pregnant again with fl.
Whew, i hope this time the spoiler tag will work.

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But what about the fact that the lover didn't react after givin that diary to the girl...it doesn't
Look like he knows the boy he is boy even after reading it...so is it really the case? We will see
For the girls nope it isn't implied, she said "the baby isn't at fault and said that evil guy got what he wanted: a girl... proof that she is his daughter but she can hate a baby who isn't responsible of anything

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Lover didn't know... The pages were ripped off. The ripped off pages are the one in the drawer
.. and there was a pause when he was asked if he is still hiding somethings..
But ofc we await what's the truth.
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wtf. i thought that count is her biological dad and that’s how she’s gonna survive. like her duke dad committed treason - death penalty, but she is not his daughter so everything good. but other than that her dad is so evil, in a way, like dude what do you want at this point? i so don’t get this type of characters, all you want is power and money? it’s not like you don’t have any of those, why so greedy? and in expense of your own children. damng dude