"I had no choice; I didn't plan to bring her over at first, but I was worried she would be upset, so I've been on tenterhooks all the way!"
"It's just that Anna is gentle-tempered and doesn't resent this sister. She pleaded with us for a long time, and we finally agreed to let the child out. But... as soon as the banquet began, she disappeared! It's Anna who understands, even though she has no blood relationship with us, she is more like the daughter of the Campbell family."
The insinuation in Nidya Hughes' words was that although the biological daughter had returned home, the house still belonged to the adopted daughter. The adopted daughter was kind, sensible, obedient, and a top noble lady, while the biological daughter was rude and unworthy of being the daughter of the Campbell family. So they had to give up the child and focus on raising the adopted daughter.
Nidya Hughes feigned helplessness, feeling that she didn't show any disgust but just a sense of helplessness.