By Alexis Tereszcuk - Breaking Celebrity News Entertainment Editor

As Ashton Kutcher and Mila Kunis go public with their romance after being photographed kissing, the actor's estranged wife, Demi Moore is suffering incredible heartache a source close to the actress exclusively told Breaking Celebrity News.

“Demi is devastated that Ashton has moved on so quickly and is dating Mila,” the friend says. "She is beyond heartbroken.

“Even though Ashton cheated on her all the time, it was with random girls, it wasn’t a relationship like it is with Mila and that is what is killing Demi now.

"Seeing photos of him kissing another woman is too much for her to handle, it's like having her nose rubbed in it time and time again. She kind of knew it was definitely over between them but I think she was still holding out a little hope for a reconciliation — now he's actually dating someone else she knows that's not going to happen."

As Breaking Celebrity News previously reported, Demi and Ashton have run into each other since she has returned from rehab, but he’s now obviously moved on with a new romance.

“Each time Demi hears about Ashton and Mila it breaks her heart. She really loved him despite the flaws in their marriage and to see him dating someone new, who is so much younger than she is, is like a knife in her heart,” the source says.