In between filming scenes on Sept. 23, an overly flirty Ashlee got touchy-feely with Colin while her husband, Pete Wentz, was on tour in Dallas with Fall Out Boy. Dressed only in a loosely tied robe, Ash, who plays not-so-innocent Violet Foster, kept grabbing Colin's hand and hugging him repeatedly, an eyewitness tells Star. "They hung out together for hours. She giggled nonstop and did the whole hair-flip thing." Ashlee has been crushing hard on Colin, who plays nice guy Auggie Kirkpatrick, since she scored the role on Melrose. "One of the first things Ash said was, 'The guy who plays Auggie is really hot,'" reveals a close friend. But while Ashlee is giddy over Colin, her husband is jealous â€" and the two have been fighting worse than ever over her costar, which is starting to affect her work. On a few occasions, she broke down in sobs after angry phone calls, says a Melrose set source.