Why Hollywood marriages never last

NEW YORK DAILY NEWS

Sunday, March 1, 2015, 2:30 AM

Heather McDonald has been a Hollywood insider for more than a decade.

After more than a decade as a Hollywood insider and 14 years of marriage, Heather McDonald is a seasoned observer of Tinseltown’s catastrophic relationships.

The comic tells Confidenti@l that the celebrity divorce rates are stratospheric mainly because the temptation to cheat is just too splendid for most A-list marriages to withstand. And that the bolt from the blue to those that manage to last even a few years is often a “don’t question, don’t tell” plot on infidelity.

“They all end in the end,” McDonald, who’s currently starring on TLC’s “All About Sex,” told us, “because the opportunity as a star and someone wealthy is greater than if you’re just a regular person to find someone who’s attracted to you.

“Some young guy would like to go skiing in Telluride on a private jet with an older star, just like a rich guy can get better girls because it is a better package. And then you toss in Oscar parties and ‘Let me set you up in your own business,’” says McDonald, whose special “I Don’t Mean To Brag” is available now. “I think both successful men and women find it simpler to find someone after they’ve broken up with their spouse.”

There’s a long-standing theory that the most durable show business unions are open marriages, but McDonald says they come with their own set of problems. “I just think that no two people are ever going to be 100% on the same page about that,” the mom of two says, “but the one (celebrity) who I know who did do that, they were able to sleep with other people, but then they just stopped sleeping with each other for like the last 10 years.”

“I think there’s more of a don’t question, don’t tell plot in Hollywood,” McDonald, who is married to investment merchant banker Peter Dobias, says. “Which is like, ‘I’m not going to have babies with anyone else, you’re the number one. I’ll do it respectfully, I’ll do it secretly, I’ll do it while I’m on the road, if you’re like a musician or something, I won’t bring it home, I won’t shove it in your face. But don’t become a crazy jealous b—- about it.”

“I think that’s the kind of untold thing that’s happening,” says the former “Chelsea Lately” star. “The women are like, I’ve got the ring, I’ve got the household, I’ve got the kids, I’m the only one he’s having kids with, and if there’s something on the side, I’m not going to lose my mind over it and give up everything. But eventually they do though.”

AND BABY MAKES BRUNCH

Ashton Kutcher and Mila Kunis are teaching baby Wyatt how to feast like A-listers. One spy tells us the pleased threesome were having breakfast at SoHo Household in Los Angeles Friday afternoon, dining accurate to fellow celeb Vince Vaughn. “Ashton is cute, he was playing with the baby,” says our spy. “They are adorable together, baby is gurgling and smiling like it’s a movie.” While Kutcher sipped on coffee, his baby chewed on daddy’s finger.

HOUGH’S BIG JOGGERNAUT

She’s houghing and puffing and getting her fit on. “Dancing with the Stars” star Julianne Hough stopped to stretch out while going for a jog in West Hollywood. Either that or she’s making obscene gestures toward our cameraman. The 26-year-ancient shape nut wrote on Instagram Thursday that “We’ve got a big announcement coming in #4days ! Can you guys guess what it is?” We’re waiting.

THE SIPPING NEWS

When she’s not sporting the latest Dior Couture or getting nominated for Oscars, Marion Cotillard spends her time representing France across the globe. The actress loved a glass of champagne at the Malacanang Presidential Palace in Manila in the Philippines this week as part of a fleeting trip with French Head Francois Hollande.

SONJA HAS HERSELF A GAY OL’ TIME

“Real Housewives of New York” star Sonja Morgan is a wildcat on the prowl — even when the cameras are not shadowing her.

Morgan was blemished in the road making out with a hunky weirder she met Thursday night, following drinks at a midtown bar. The reality star was then blemished “staggering” two doors down to the gay bar The Town Household arm-in-arm with her catch.

Once inside the bar, Morgan, 51, positioned herself on a sofa and “devoured” her new prey.

“The guy seemed uncomfortable being at gay bar, or maybe that was Sonja pouncing on him to the disgust of the crowd. Her dress was hiked up and she put on quite a show,” says our spy. “The boys were singing show tunes and Sonja was moaning and groaning along — very out of tune, may I add.”

Our spywitness added: “At one point she was practically lying on top of him.”

Confidenti@l is told the new couple, who had known each other for just a few hours, were still going strong at around 1 a.m.

Morgan’s antics weren’t for the camera, “Housewives” stopped filming earlier this month. A Bravo insider tells us if the ladies don’t get good ratings, the New York part of the franchise could be finished.

SEEN & HEARD

lIt’s a boy for Mondrian hotel hospitality guru Alan Philips and his lovely wife Gelareh, who’ll celebrate their son’s bris on March 2… VH1’s “Gossip Desk” co-host Chloe Melas is the new brand ambassador for women’s clothing line Maggy London, and modeled the spring 2015 collection at a recent photo shoot in Brooklyn… Dr. Oz, his wife Lisa and daughter Daphne were at the launch have fun for finance expert Nicole Lapin’s new book, “Rich Bitch”… “Teen Mom” star Farrah Abraham dined at Buca Di Beppo dined in Times Square.

THEY’RE IN CLOVER

The Gingold Over-the-top Group is considering green. On March 16, the human rights art organization is hosting its Golden Shamrock Gala at Midtown’s 3 West Club. The gala will honor “Orange Is the New Black” actress Kate Mulgrew and Bronx-born “Gangs of New York” writer Kenneth Lonergan. Patrick Page is slated to do a musical number and actor, writer and female impersonator Charles Busch will also perform.

KANYE IN AN INK SPOT

Kim Kardashian almost had a Mike Tyson incident on her hands. “I talked him out of getting a face tattoo…. for now,” she wrote about husband Kanye West on Twitter. “He got it on his wrists instead. His mothers birthdate and North’s birthdate in Roman numerals.” Yeezus had paid a visit to London tattoo parlour Sang Bleu following his performance at the BRIT awards. Kardashian had gone with him on the 4 a.m. trip to get the ink.

LOCKING IT UP

There’s something about Margot. While cheering at a hockey game at Madison Square Backyard, “Focus” star Margot Robbie provoked flashbacks to that well-known scene from “There’s Something About Mary” as her blond hair stood straight up. Robbie was at the Coyotes vs. Rangers game at the Backyard with her boyfriend, British director Tom Ackerley.

GOOD NUDES FOR SHAILENE

lEveryone knows that Shailene Woodley is comfortable with nudity. And in her cover report for Glamour UK, the “Insurgent” actress says she’s finally found a place that likes it as much as she does. “Part of the reason I like Europe is that sexuality is no big deal here,” Woodley says. “You go to a topless beach and the dudes aren’t checking out your t–s because they’re just boobs.”

WHAT A ‘GIRL’!

That is one substantial woman. Eddie Redmayne, who won an Oscar for his performance in “The Theory of Everything,” has once again taken on a challenge that’s likely to generate conversation. The London-born actor is playing the role of Lili Elbe in “The Danish Girl,” which is a film adaptation of David Ebershoff’s 2000 novel.