"我應當去做點我自己的事，我應當這一輩子有點價值吧？" - The best thing she can do is to yield the job to young people who need to have a career and money for future and family later. So pleas do something good for young people and the society, please.
You can start working at any age in the U.S and find pretty good jobs with full benefits. Age isn't a problem here. And there's no reason to stay at home for 20 years. 3 is old enough for a child to go to daycare. There's nothing to do anymore at home after that. So 8 to 10 years for three kids is enough.
