Pete Wentz shocked Ashlee pictured with another man

Pete Wentz is said to be "shocked" Ashlee Simpson has been spotted with another man.

The Black Cards rocker was surprised to find his estranged wife – who filed for divorce last month - pictured with his friend, D.R.U.G.S musician Craig Owens.

A source told Usmagazine.com: "Pete did a lot for this guy. Craig was in another band and got kicked out. Pete found Craig, built a band around him and signed him. He's shocked at how this guy is repaying him."

Sources close to 25 year old Ashlee – who has two-year-old son, Bronx with Pete – claim despite pictures of heavily tattooed Craig, 26, with his arm around her, they are just friends.

A friend explained: "Ashlee and Craig are long time friends. They have spent some time together, and he is comforting her throughout this difficult time."

Despite Ashlee applying for sole custody of Bronx on her divorce papers, and Pete requesting joint care, another source said they are both working to reach an amicable agreement.

A source told website People.com: "Ashlee and Pete's split is amicable and they're working together to make this as positive a situation for Bronx as possible."