In a lot of ways Isabelle acts no older than Esme, she constantly looks anxious and the root cause is Chris. Imagine being terrified that every time they are out they are likely to get things shouted or said to them. Esme and Isla are really still too young to grasp what their Dad is like. Esme is very much like Chris in her personality and I think she will react as if it didn’t happen. The family have created a cult, simple as. Of course their childhood seems wonderful they have nothing to compare it to as their parents have cut off any sense of normality.