Many women cut back what had to be done at home by redefining what the house the marriage and sometimes what the child needs. One woman described a fairly common pattern: I do my half. I do half of his half and the rest doesn't get done.
I hate the stereotype of the pitfalls of the child actor. There are so many amazing examples - Natalie Portman Joseph Gordon-Levitt Jodie Foster Drew Barrymore - of people who have made it through.