In the end their roles never changed... If you want to know what I'm talking about the raws are down below
https://rawkuma.com/manga/the-reason-why-raeliana-ended-up-at-the-dukes-mansion/
Why does the twins status as illegitimate children causes their powers that comes from being a part of the imperial family to be flawed?
For example, their healing powers aren’t effective since scars appeared from their abuse during their time in Delorina Castle. And they didn’t completely manifest into their adult forms.
Is it because of the “impure” blood that comes from their mother? Do the twins really have to be born of pure noble blood from both sides of the parents?
oh! No, it is not due to them being "impure" at all! It is because the powers that they gain is shared with their guardian. However, the guardian gains power through the pride of their masters, and since the twins HATE their bloodline of being royalty, the guardian (the red fox) is unable to gain any powers and is barely able to retain his own form. I hope I helped to clear that up!!
Of course~~ I absolutely love this manga (≧∀≦) it’s my first time seeing an isekai manga featuring reincarnated siblings since I’ve seen quite a lot of mangas, reincarnating into the villainous or side character is quite a common troupe for me now, though there is nothing wrong with that, they’re interesting in their own ways~ ( ̄▽ ̄)
I present you the novel:
https://novelfull.com/index.php/remarried-empress.html?page=4&per-page=50
And for those who would like to enjoy the art as well as the story at the same time,
you may or may not have to wait for 12 - 13 new chapters for a divorce to be mentioned for the first time. ( ̄∇ ̄")
And maybe another 17 - 18 chapters for the divorce to happen.