Kim Kardashian and Kanye West ‘WILL split after their third baby’

Kim Kardashian and Kanye West might have looked like matching glittery sex robots on the Met Gala 2016's red carpet last week, but their relationship isn't actually as solid as they're making out.

That's according to celebrity biographer Ian Halperin, who tells heat exclusively that their marriage has an expiration date – and it's coming soon.

Speaking to us after spending months infiltrating the Kardashian klan, Ian said the couple are a "ticking time bomb", thanks to Kanye's controlling nature.

"You only have to look at him styling Kim on the red carpet at the Met Gala to see he calls the shots," reckons Ian.

"Kanye is a Svengali figure, he's in control, but in some ways Kim doesn't mind."

Given the highly pressured nature of Hollywood romances, Ian believes Kimye aren't completely future-proof.

"They do love each other, but in some ways it's also a marriage of convenience. I don't think the relationship will last more than two or three years. They're a ticking time bomb," he claims.

Part of the reason their marriage is in trouble is because Kim and Kanye can't decide on how many kids to have.

Kim, 35, admitted recently that she would rather stop at two children – North, two, and Saint, six months – but Kanye, 38, has been "mentioning [having another baby] every single day lately for the past ten days", says Ian.

"I know Kim doesn't want a third baby right now, but Kanye is used to getting his way. I think no matter what Kanye says, she's going to do eventually. I think they'll have a third child soon."

It comes after Kim recently spent £100,000 on a plastic surgery overhaul, which involved a boob job and liposuction to help her see off the four stone of baby weight she gained with Saint.

As heat told you last week, Kim's new body has helped retain Kanye's attention – she even believes it's "saved" her marriage.

But for how long – and at what cost?

Kim Kardashian naked - every nude picture she's EVER posted