The red head is mc mommy's friend. She asked her husband the emperor to marry that woman. The emperor did not want,but since MC's mommy came from humble background iirc she's from a fallen duke's house. And that red head from powerful Marquis,at first she showed friendly atmosphere but she's greedy. The emperor did not want to sleep with her,but she drugged him. That's the reason why the emperor hate her,he dislikes her even in the past
According to some spoilers,red head princess is not emperor's bio daughter, she's a fake. That's the reason the empress wants to steal Shushu's power. Emperor truly loved his wife,he wasn't there when she died. The emperor never acknowledge the red head as his daughter but he needs to be civil. I pity him actually. And I'm glad there's no uncomfortable scenes between FL and her adoptive brothers unlike in other manhwa. And about the first timeline, emperor was cold towards FL because he believes that his child is a boi like what the doctor said,his wife's friend. And the red head used manipulation to them, emperor and his son.
Maybe because polygamy exist in their country and she pitied her husband who was pestered by the nobles. I forgot the reasons but I'm relieved after reading the spoilers that she's the first wife,the empress. The root caused of these all is that she let that red head in in the palace as her husband's second wife. Like the spoilers said,the emperor was against taking in another wife. He told his wife that he can handle everything but the wife persisted saying that red head can help him politically. She did not think of other possibilities because at that time red head was very good to her. The emperor agreed but never wants to sleep with red head.
Gosh, I'm going to sleep now when I receive notification of your question lol. Like I said,the emperor did not want to sleep with the red head but she drugged him,put it in his tea. The red head princess aren't love by them emperor, it's obvious. The emperor did not believe she's his daughter but he has no evidence and in the first timeline,the red head stole shushu's power and gave it to her daughter inside a necklace. So in the future chaps,when emperor and FL are in good terms,she still live with the grand duke, FL will tell the emperor about the red head princess and how her power was stolen blah,blah, blah. If you remember in the first chapters when FL told emperor that she's his daughter and she have to prove it? But then her power is so weak? That is also what red head princess will do in the future. Emperor will ask her to prove her power, empress will try to stop it but the emperor will insist. The necklace she wore with fl's power has still a small amount of power so she still manage to survive somehow. But it will be proven tho
That's something that doesn't seem clear to me. Did the emperor marry the Mc's mom and the villainess at the same time, had the prince, and then impregnated both women to have his daughters? Or did he marry the villainess after the mc's mother's death? From what I am understanding the heroine's mother came from a poor family, while the villainess is powerful. Yet, her daughter seems older if not the same age as the mc. I also will wonder whats the excuse for ignoring his daughter in the original story/first time line.
Just to add, while I love romance, I'm actually glad that there is little to no romance at the moment. I love just seeing her with her father and brothers.