They're rushin' to the newsstands with this one!
It's even sadder than we thought. Ashton's wandering eye had Demi doubting herself all the time. Her insecurities only grew because of his betrayal of commitment which led to nagging questions that, albeit justified, drove Ashton even further away.
The marriage had been deteriorating for a long time. Ashton was ready to end it, but he wanted to wait for Demi to actually do it. He loved her but couldn't live with her.
She really wanted to save the marriage but couldn't deal with the pain of his cheating. They were fed up with each other.
If anyone was uncomfortable with the age difference, it was Demi, not Ashton. She drove him crazy after a while with questions and doubts.
Ugh. So terrible. But hey, maybe now every Tumbling woman's fanfiction can come to fruition — maybe one day Demi will get back with Bruce Willis! …ha! That won't be happening for a while. He seems pretty in love with his new(er) lady.