This is a very reasonable and rationale reaction. If she was calm about it or happy about it, I think it would be unrealistic. It also shows the lack of trust between her father , and moreover her family. I also think this hurt significantly more since her only safe space got shattered and she probably has no one to lean on.
I have been through mangaOwl , Bato , Vvymanga and the downfall of multiple manhwa websites.