I wonder why the brother is looking for her. I've read every available chapter in the novel (everyone translated to English) but I still can't figure it out.
The prince is an imbecile and he realized his mistake so he is acting all wishy-washy and didn't even apologize like the asshole he is and was more like "why didn't you tell me I misunderstood you" or something like that. Basically, he'll continue to be garbage so there's no hope for him.
But the bother, I can't figure out. Her garbage "mother" and "brother" never cared for her and only cared about their reputation and power. She seems terrified and even traumatized because of her brother in the novel so there's no way he is after her because he wants to change and wants to make amends. He either realized how great she is (she has done so many amazing things in the past including saving the forest and making those contracts) and he realized that in her absence, the family would lose all those benefits or he was just like "the prince wants to get her back so I'll look for her as well so she'll be queen and benefit the family"