Do we really need to tell you why?
If you remember, Demi was married to Bruce Willis for thirteen years before she met Ashton.
Based off of Bruce's work as a thespian, piece of mind could easily mean piece of FIST TO THE FACE!
We actually hope it doesn't come to that, but if we were Ashton, we'd be scared. Very scared. An insider explained Bruce's reaction to sources, saying:
“When Bruce found out he flipped. He plans to confront Ashton and give him a huge talking-to. Although he and Demi split in 2000, he still considers her family. Bruce believes if you mess with someone he loves, you mess with him. He trusted Ashton not to hurt his family and is planning to give him a piece of his mind. When he finally catches up with him it won’t be pretty.”
Good luck with that, Ashton!
[Image via WENN.]