This morning Star Magazine caused a firestorm when they call Ashton Kutcher out for cheating on wife, Demi Moore.

They reported:

Their 15-year age gap always made Ashton Kutcher and Demi Moore seem like an unlikely match. And now, just five years after getting married, the couple’s relationship is in danger of falling apart as Star breaks the bombshell news that the actor was caught cheating with a sexy, young 20-something.

In the Sept. 13 issue of Star, on sale today, we report that an eyewitness saw the Punk’d mastermind kissing and groping a hot young blonde by an out-of-the-way bathroom at Italian restaurant Madeo in L.A.

“Ashton had this gorgeous girl pinned against the wall, and he was totally making out with her,” an eyewitness, who was on his way to the restroom tells Star. “I was shocked to see him sucking face with a girl who obviously wasn’t Demi.”

When Demi learns the truth of about the steamy session — which Ashton’s rep denied — it will be her worst fear come true.

“All along, Demi was told it would never work, that he’s going to cheat,” a friend tells Star. “When she finds out that it happened, she’ll be devastated.”

Ashton took to his Twitter to deny this story, calling it “fiction”.  He said “I think Star magazine calling me a “cheater” qualifies as defamation of character. I hope my lawyer agrees. STAR magazine – you don’t get to stand behind “freedom of the press” when you are writing fiction.”

Wife, Demi agrees! She wrote “No question! Excellent point my love!”

Tags: Ashton Kutcher, Demi Moore