Jodie Sweetin & Cody Herpin Splits

Former Full House star and new mom Jodie Sweetin is splitting with her husband.Sweetin, 26, filed papers Wednesday in Orange County, Calif., for legal separation from Cody Herpin, 31, whom the actress had once called a "blessing" who helped turn around her life after years of methamphetamine addiction. The couple became parents of daughter Zoie in April.

"I was dumbfounded," Herpin tells PEOPLE, adding that Sweetin left their home and took their 7-month-old girl. "Over this past month something has been different. I'm concerned about our daughter and I just want (Zoie) home."

Sweetin's agent, Stella Alex, says the actress is "absolutely clean" and that the couple have "come to this path in their life and she felt like this is the way she had to go. Jodie says it's unfortunate but it's just what has to happen right now. No more detail, only because she says she doesn't want to be disrespectful to him." The pair were married in July 2007 and recently announced they were working on a reality show together.