Sex in her 18-year marriage had gone routine and stale. What’s more, forty-something “Robin Rinaldi” wanted a baby, something her husband was adamantly against. So she proposed a limited open marriage, a 12-month sexathon with strangers, and she has written a book about it.

In The Wild Oats Project, Rinaldi writes, “Stuck in a rut — our once-a-week sex life was loving but lacked spontaneity and passion — I was craving seduction and sexual abandon.”

Since motherhood was closing for her, Rinaldi rushed toward what she calls, “this whole other outlet of heightened female experience — taking lovers.” She and her husband came to an arrangement. She took an apartment where she lived and cavorted during the week and on the weekend came home and lived as a wife.

She placed an ad on a hip sex site called nerve.com where she made it clear she was not interested in any kind of lasting relationship, only action and plenty of it. No more than three encounters per guy, and even a few gals. She got dozens of responses in the first few hours.

Rinaldi took workshops at something called OneTaste, a “sexual-education center” that she calls “a sex-friendly yoga retreat” where she learned “orgasmic meditation.” She says, “The lessons I learned weren’t purely physical. They were about growing up, making mistakes, learning to live without so much fear, owning up to my dark side and, eventually finding out the difference between being a ‘good girl’ and a good person.”

In a video, now blocked, attached to her column in the New York Post she insists the reader will be surprised at the ending to her 12 month sexual odyssey.

What she found was that coming back to her full-time marriage after a year “proved more difficult than I had thought.”

She found out her husband wasn’t playing the sexual field like he was supposed to; he had found one person to be with sexually for that year. And Rinaldi found herself drawn to one of the men she met through her original nerve.com ad, a writer with whom action “in the bedroom was mind-blowing.”

The big surprise — that she and her husband both found other lovers and divorced after 12 months of an open marriage — is likely not a surprise to anyone except Rinaldi.

Dr. Jennifer Roback Morse, an economist who runs the Ruth Institute in California, writes frequently about what she refers to as the “victims of the sexual revolution” and she would include Rinaldi and her husband as among those “victims.”

In an exclusive interview with Breitbart News, Roback Morse, says: “I knew people back in the 70’s who experimented with open marriage. I know of no one for whom it actually worked. I know of an out-of-wedlock child that wasn’t supposed to happen. I know of a suicide. I know of several divorces. No surprise that the ‘Wild Oats Project’ ended in divorce.”

“I am appalled that the elites of this culture continue to encourage ‘experimentation,’ when the experiment has already been conducted and has failed,” she said.

Roback Morse points to the results of the sexual revolution, including an epidemic of sexually transmitted diseases that come from unbridled sexual experimentation, the hook-up culture in colleges, the commonality of out-of-wedlock births and the poverty that come with it, and the general degeneration of family formation and divorce.

She dismisses Rinaldi’s Wild Oats Project as “so twentieth century.”

Follow Austin Ruse on Twitter @austinruse