My daughter should act her age

A couple of days ago, my 7-year-old daughter said:

The problem with [my sister] is that she acts like a 10-year-old. She should act her age. She is only 5 years old, and she should act like a 5-year-old.

I didn't tell the kids, but this is actually an extremely serious problem for them. Both kids do indeed behave with a high level of maturity that is very uncommon for kids of those ages. It seems like proof of good parenting to me. But to the court-appointed psychologist, it is proof of my "unorthodox" parenting, and just another reason to send me off to a re-education camp. In other words, I must be punished and the kids must lose a father, because they are too well behaved.