Pete Wentz Reveals What Went Wrong in His Relationship With Ashlee Simpson

We were all really shocked when Ashlee Simpson and Pete Wentz called it quits in 2011 after nearly three years of marriage. In a new interview with Howard Stern, Pete finally opened up about the shocking split and it sounds like it caught the couple by surprise, too.

"I thought it was forever," he said. "My parents have been married, I think, 35 years. I don't really know. Forty years, this year, maybe? But no, I didn't. At the same time, we were both very young."

So, was that it? They were just too young? Perhaps part of it, but as Pete explains, there is more to the story. When his band Fall Out Boy took a hiatus in 2010, Pete had trouble figuring out who Pete Wentz actually was when he was not being the lead singer of the hit band.

"I had the beard, the flannel shirt. I didn't know what my identity was," he says. "That factored in. When your identity is what you do, it's hard when you stop doing it."

"It was the first time where I was like, 'Well, no one's really taking my picture. I'm just basically hanging out with my kid all day. Who cares?" he says, admitting that he hit his low point after that.

When asked if he was upset that Ashlee 'broke up with him at his low point,' Pete admits that he was upset at first, but confesses, "I would be an idiot to think that I didn't contribute to the unraveling of it."

The good news is that they seem to be co-parenting well together and they're both very happy in new relationships. Ashlee married Evan Ross in August of last year and Pete and his girlfriend Meagan Camper welcomed their son in the same month.