What's the rudest question you can ask a mother?

Tina Fey, in this NYer piece, suggests that the rudest question you can ask a mother is "How do you juggle it all?" followed by "Are you going to have more kids?"

Not being a mother, I cannot totally relate, but I can suggest my own list of rude questions to ask a woman (in her late 20s):

• Did you used to be a swimmer?
• Why aren't you cohabitating/engaged/married?
• Is it really that hard to find a new job?
• Did you have to rob the grave of some man who died in 1959 to find that watch?