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New York City's former first lady has had a lot of experience in the ways of love: Donna Hanover was divorced from Rudolph Giuliani after he cheated on her following 20 years of marriage, and later she rekindled love with a high school sweetheart and married him.

Now, Hanover, an actor and television personality, is putting that experience to use as an AOL Love & Sex Coach.

Hanover, who wrote "My Boyfriend's Back," in which she recounts finding love after divorce and marrying her high school flame, Edwin Oster, in 2003, tackles some of the following questions in her AOL online video forum:

— Is it OK to hook up with an ex just for sex?

— How can I get my kids to accept my new partner?

— How to make a long-distance relationship work.

— Should I pursue an ex-flame who is married?

To the last question, (no surprise) Hanover gives this advice: "I would say tread very carefully. ... If you respect marriage, probably the best thing to do is back off and go a different direction."

For Hanover, her marriage to Oster was her third; it was the second for Oster.

Giuliani, who dated Judith Nathan while still married to Hanover, wed Nathan in a Gracie Mansion ceremony in 2003.