January Jones has no regrets about her decision to raise her son Xander, 20 months, in a single-parent household. The 35-year-old Mad Men actress opens up about motherhood and her son's paternity in the latest issue of Net-a-Porter's The Edit.

"I don't have room for anything else, so I don't know how I would have done it with a partner. I knew I would be raising my son alone," says Jones, whose ex-boyfriends include Jason Sudeikis, Ashton Kutcher and Josh Groban. "It was something I went in to knowingly, I was prepared mentally -- and I was excited about it."

Jones adds that being pregnant was the "most healthy and peaceful I've ever felt."

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The actress has repeatedly refused to reveal who fathered her son, telling the magazine, "It's just not something the public needs to know. I don't divulge my sexual preferences. There are parts of your life -- no matter what your job -- that should remain private."

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The South Dakota native continues, "When I was starting out, other actors advised me to keep certain things close to the vest. When you become a public figure people want to know everything about you, and then [they] pick it apart -- it becomes negative. When my son asks those questions, I want him to [hear it from me]. I don't want him to be able to Google it."

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Jones says she is keeping her baby daddy's identity a secret for another reason: having an air of mystery keeps the focus on her work. "As an actor, if people know too many things about you they won't believe you in a certain character," she tells The Edit. "You don't want people to have a preconceived notion of who you are."

This article originally appeared on Usmagazine.com: January Jones Talks About Xander's Father, Her Sexual Preference