According to Star Magazine, Ashlee Simpson and Pete Wentz are having troubles in their marriage. Not only have they both been seen partying separately lately, but Simpson has found evidence that Wentz has been cheating on her.

It was Ashlee Simpson-Wentz’s worst nightmare come true. While rummaging around in a guest bedroom in her $4.7 million Beverly Hills home on Aug. 19, she discovered what she believed to be evidence of husband Pete Wentz cheating on her, a friend tells Star. Ashlee was so distraught that she dropped off their 9-month-old son, Bronx, at her parents’ house and checked into a hotel, even though Pete was performing with Fall Out Boy in St. Louis that night. “I can’t stand being at that house anymore,” Ashlee, 24. told her pal. “I need to clear my head. I have a lot on my plate, and my marriage is stressing me out.”

But when she called Pete to talk things out, he didn’t answer, which only enraged her. After repeatedly calling him (and getting his voicemail), Ashlee finally reached her husband – and snapped. An insider says she screamed, “Don’t even bother coming hoe! I don’t want to look at you!”

She must have struck a nerve, because that same night, Pete posted on Twitter, “Money doesn’t grow on trees. Neither does happiness,” before referring to himself as an “a–hole.” Four days later, he took a break in the band’s tour and traveled hoe to L.A. Pete Twittered about his excitement to see his son – but made no mention of his wife: “Can’t wait to see the little homie.”

As Star reported, Ashlee has long suspected her husband of getting too close to the young female musical acts he works with, Hey Monday and Millionaires and she can’t take the flirting anymore! “Ashlee doesn’t trust Pete at all,” says an insider. “They fight all the tie and sometimes don’t speak for days. Things have gotten bad. Pete doesn’t want to deal with Ashlee and her drama.”

Pete’s flirting sparked the latest public brawl between him and Ash at the one-year anniversary of his Chicago bar, Angels & Kings, on Aug. 15. Although he hadn’t seen his wife in almost a month and she’d come to town just for the day to support him, Pete, 30, quickly left Ash in the VIP area to hit the DJ booth and party with friends. After an hour and a half, she’d had enough and stormed over to her inebriated husband, says an eyewitness. “Ashlee was fumin. She yelled at Pete, ‘Enough! Let’s go!’”

Is this story true or not?

VERDICT: Epic – totally true!