You can fix it by either Cheating or Start a New Save.
You can only fix the relationship only at the early hate stage.
Пожалуйста расскажите тогда как правильно играть?
Just treat her nicely. Do not scold her, do not punish her, just love her, give her headpats, it's not even hard, and I don't even need to tell you this because "it is common sense for someone to treat their loved ones nicely".
There's no way to fix this unless you cheat.
