Depends on what "a job" means exactly.
Is she an STNA, making 38k a year, or she a NASA aerospace engineer bringing in 85-130k a year?
Are the kids by the same father? Is he still in their lives? Was this a failed marriage that left her with two kids, or was she an irresponsible adolescent who couldn't keep her legs closed?
How healthy is her lifestyle, and how healthy are her bank accounts? Does she own a home? How much time and effort does she put into her child's education? What kind of shape is her car in?
Does she workout daily? Is her hair natural? Does she dress well, without overspending? Is she a "free spirit" or a drug user/heavy drinker?
There are a lot factors that go into it.