She’s been enjoying motherhood in the 20 months since giving birth to her son Xander, and January Jones doesn’t have any plans for revealing details regarding the youngster’s father.

Over the weekend, the “Mad Men” babe told press, “That’s my son’s business. It’s not the public’s business.”

Jones continued, "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.'"

"Women should have lots of secrets. It's our right to have secrets. Otherwise, what would we write in our memoirs?"