The Real Housewives of Beverly Hills’ Adrienne Maloof isn’t the only one rebounding from her divorce with a younger counterpart.

Life & Style has exclusively learned that Adrienne’s ex-husband, plastic surgeon Dr. Paul Nassif, 50, has moved on with a beauty queen, 27-year-old Helen Marie Salas, that he’s tried to pass off as a babysitter for his three sons with Adrienne.

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“Paul has been seeing Helen for several months now, but he didn’t want to take any heat for it, so he told Adrienne that Helen was the boys’ new nanny,” a friend of Adrienne’s reveals in the new issue of Life & Style. “When Adrienne pushed him for more information — so she could do a background check on the woman she thought was watching her kids — she discovered that Helen was really Paul’s girlfriend. She felt completely duped!”

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A former Miss Nevada USA, Helen was based in Las Vegas, which has Adrienne, 51, wondering about all of Paul’s trips to Sin City during their marriage.

“While they were still together, Paul would go to Vegas and go off the radar, not answering phone calls,” the friend tells Life & Style, adding, “Adrienne would hear from friends that he was partying with a girl, but she couldn’t believe he would do that, even though she knew things weren’t going well in their relationship.”

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Now that the truth has come to light, “she thinks he’s been seeing Helen since at least March or April of last year,” says the pal.

For more, pick up this week’s issue of Life & Style, on newsstands now!