The final straw for Demi: Ashton's baby news

As the actor and Mila go public with their love, the worst is yet to come for his shattered ex.

Last month, Mila Kunis insisted to a US magazine that she and Ashton Kutcher were “just friends – there’s no crazy love story”. And Ashton’s troubled ex-wife Demi Moore clung like a drowning woman to a lifebuoy to the hope that the younger actress was telling the truth.

But after months of speculation – with Ashton and Mila spotted together several times a week – Demi’s worst nightmare was finally confirmed when pictures surfaced online of the pair kissing tenderly at a movie-wrap party. It was all too much for the fragile 49-year-old, who earlier this year collapsed and was rushed to hospital then sought professional treatment for “overall health” issues. “Demi is beyond heartbroken. Even though Ashton cheated on her all the time, it was with random girls,” a source tells Radar Online.

“It wasn’t a relationship like it is with Mila, and that’s what’s killing Demi now. She was still holding out a little hope that they’d reconcile.” The knowledge that her estranged husband is getting serious with an actress 21 years her junior – whom he’s known since they played on-screen lovers in That ’70s Show and who recently topped a Sexiest Woman on the Planet poll – is bad enough. But it’s about to get a lot more painful for Demi.

Insiders tell Woman’s Day exclusively that infamous playboy Ashton, 34, is not only already talking marriage with the Black Swan star, he’s asking if she’s ready to have kids with him. While she’s in no rush, recently saying she wants to be a mum in five years’ time – Ashton wants to be a dad sooner rather than later. “Ashton and Demi tried for years, even with IVF – but Demi just couldn’t,” a close friend of Ashton said.