I'm taking that story (which came from Alice) with a massive pinch of salt. More like Alice kept her away from school because she was lonely without Ioan and wanted to make him feel guilty about being awayI recall Ioan saying in an interview that when he was the first time shooting Harrow in Oz Ella would have called in sick from school just to be with her mom because since her dad was away she wanted to be close to her, or something to that effect. These sort of things can happen with young children, it's just important that they don't manifest into a long-term trauma (which it may have done in this case)
that's precisely why they need a enormous amount of therapy. It's a lot less about them being forced to like their abused father, but this doesnt get into her small brain.