Why do i feel like baek cheon(?) and ye hwa are real sisters and the real child of the the...

Then the emperor she just married would have known their mother who is a mere peasant? If they both belonged to ye hwa's mother in the first place, it means none of them have royal blood (except if plot twist, the biological dad was the previous emperor or some shit) but then why did this emperor, the 8th prince's father, say that she resembles her mother ? If your theory is right he would have met their commoner mother who was nothing but a maid breastfeeding the actual "princess" ?

i know this may be wayyy out of the picture but what if the brother of the current emperor is the father of the twins that’s why the current emperor knew the commoner mother. like, what if the reason why ye hwa’s mother insisted on leaving the palace and marrying some shitty man is that the real father of the twins is after them so she wanted to get away. i don’t know anymore i must’ve watched too many twin related movies lately on the other hand what if the twin’s real father is the emperor and that the 8th prince is not really his child?

The 8th prince have to be not his child because the mother of the prince kept begging the emperor to save her child and he looked at her with hatred.. So possibly she cheated on the emperor and slept with another man so that's why he have hatred toward her and she isn't the empress and he doesn't visit her.. The mother of the 8th prince didn't tell the prince that he isn't his dad. And Ye Hwa I bet she is the real princess and the bitchy bark chon is the daughter of the servant. So the empress the true mother of Ye Hwa probably wanted to protect her daughter so she made the servant raise her daughter while she raises the servants daughter because their empire is gonna fall.. That's why those concubines kept saying the princess empire is fallen and she is from a fallen empire... Something like that.. It makes sense for me that way.. And that emperor he married the princess because he want to protect her or maybe because he knows her mother so that's why he took her in as one of his concubines to save her because their royalty is falling.. And when he saw Ye Hwa with her wedding gown on and said she really resembles her mother because he knows her mother and Ye Hwa is the true princess and Baek is fake..

Honestly your theory is quite possible. But I don't think Baek is really "fake". More or less someone that shouldn't have been in that position in the first place but she was still raised as a princess. Would you say to an adopt children that they are just a fake one and that the true one isn't there at the moment?
I'm not trying to defend anyone but Baekcheon was raised as a princess in the royal family, maybe she was adopted or maybe not, she's still a royal children. So there is no fake princess. Just two princesses raised differently and searching their own happiness. Maybe Yehwa would have been the same if she was raised as Baekcheon was, no one knows. And no one may ever knows.
Now this manhwa's concept clearly will be about both character's development. So saying now that she is a fake is implying that she do not deserve whatever happiness she lived as a princess. Then in that case, she shouldn't have met Yehwa, and Yehwa wouldn't have become a princess. She wouldn't have met the Prince (or maybe yes) but every one should remember that everything Yehwa lived right now whatever it is, is due to her destiny beside Baekcheon.

And that's literally the point of this manhwa. We'll see Baekcheon becoming a grown up gentle child while Yehwa will becoming more confident and wiser. If that's not the case honestly then shit the author is really unnordinary. :')

What if baekcheon still being a bitch and selfish for the rest of the chapters so what would be your opinion? ┑(￣Д ￣)┍

I will still be waiting for a reverse situation x')
Because that's my hopes that are in the game right now :')