The one thing about this story that concerns me is that it feels like family is secondary and this is more romantic. Like it's supposed to be more about developing her relationship with the "beast" rather than the new family. So I worry that it's going down a route where the family are all horrible people at the end, and she's the only good one.
I find such a story dumb and boring cause it already goes on the prejudice of the first impression is all that matters. If a person seems like a bad person or is mean to you at first, that's all they are. Which I dislike. The father clearly shows signs of regret over breaking his promise with his lover, seeing her through Blondina. The brother might be mean, but more than anything, he's just incredibly naive and ignorant. The sister is the only one that actively shows hostility and wants to ostracize her sister more than anything. I hope that all three start to come around and change their attitude, cause otherwise, this story doesn't feel that interesting.