After having given birth some 20 months ago, January Jones still will not reveal who the father is of her son, Xander.
In an interview with the New York Times, the actress says that it is none of anyone's business.
"That's my son's business," Jones explained in a May 19 interview. "It's not the public's business."
She added: "Jack Nicholson once told me: 'You should never give your personal life away, otherwise people will pick you apart. They'll never believe in your character.'"
And secrets work for her not only when it comes to her son.
"Women should have lots of secrets, it's our right to have secrets. Otherwise, what would we write in our memoirs?"
The Mad Men actress has had many beaus over the years that include Jason Sudeikis, Ashton Kutcher and Josh Groban.
Perhaps one of them if the father -- there's also just as much a chance none of them are.