From an interview with Betty:
Betty White is greener than you (and a GINK role model too) | GristLopate: You've never had children and you write that you're not a big believer in being able to do both -- having a career and being a mother.
White: But I meant I know a lot of girls who do that very successfully. I know myself too well that I'm so compulsive I would not to justice to them.
Lopate: Because there are a number of people who've talked about achieving that balance: Michelle Obama, Meredith Viera, Tina Fey --
White: Meryl Streep.
Lopate: They've been able to pull it off. ...
White: Yes, but that's, that's -- they know themselves well enough to know they can accomplish it. I know myself well enough to know I would feel guilt about neglecting the children every time I'd go to work.
Lopate: So the career wound up taking precedence --
White: And I've never regretted it.