I don't know any spoilers, but I hope it turns out that Catherine isn't even the white haired cheating bastard's real daughter. It'd be fun if it turns out that Isel is his only real daughter, while Catherine is some child between his mistress and his brother or whatever, and that's why she looks like him (idk if cheating white-hair bastard has a brother tho, but I'd just like him to suffer having also raised a fake daughter and the real one hates him now).
I don't know any spoilers, but I hope it turns out that Catherine isn't even the white haired cheating bastard's real daughter. It'd be fun if it turns out that Isel is his only real daughter, while Catherine is some child between his mistress and his brother or whatever, and that's why she looks like him (idk if cheating white-hair bastard has a brother tho, but I'd just like him to suffer having also raised a fake daughter and the real one hates him now).