ashtondemi230.jpgAshton Kutcher may be getting fed up with the 15-year age difference between he and wife of five years, Demi Moore.

Although Moore, 47, has the body of someone half her age, Kutcher was caught cheating at Italian restaurant Madeo in Los Angeles, according to Star.

A source tells the mag that Kutcher, 32, was seen near the restaurant's bathroom "groping a hot blonde" who appeared to be in her 20's.

“Ashton had this gorgeous girl pinned against the wall, and he was totally making out with her. I was shocked to see him sucking face with a girl who obviously wasn't Demi," an eyewitness adds.

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

To prove that she's still in incredibly good shape, Moore posted this sexy bikini shot on Twitter.

twitterdemi460.jpgCourtesy: Twitter

After seeing this pic, Ashton may want to think twice! Both Demi and Ashton's reps have not returned our requests for comment.

Update: Ashton has reponded to the story with the following tweets: