Responses

There's nothing wrong with that, and I agree with that.
But they have no consideration for their biological daughter, they already know that the daughter they raised treats her badly.
And that same daughter abandoned them at the first opportunity to stay with the new rich family and only came back because she was in trouble.
The manhwa doesn't tell in detail, but the novel makes it more explicit how ungrateful they are being to their biological daughter.
She gave them all the support they needed to live, and she didn't even get a single thank you.
But from here on out the story changes.
It's kinda sad that her parents loving the daughter they raised is treated as a flaw they have to overcome.
Like obviously I'm on Siyeon's side and they shouldn't have asked that of her, but there's nothing wrong with loving someone they raised for 20 years