DEMI MOORE suffers heartache as pix of estranged hubby ASHTON KUTCHER canoodling new love MILA KUNIS go public.

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

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.