Ashlee's Crushing On Her Co-Star!

What would hubby Pete Wentz say???

There's a report on Star Magazine claiming an "overly flirty" Ashlee Simpson was getting "touchy-feely" with her Melrose Place co-star Colin Egglesfield...

Apparently, a close friend reveals that Ash thought this guy was "really hot" from the beginning. Oh, and Pete Wentz is totes jealous!

A set source says he and Ash have been fighting on set, overhearing her "break down in sobs after angry phone calls." Uh-oh.

I only refuse to believe this because, as Ash has no chemistry with her co-stars on screen, how could she possibly have it off?