02/21/2008 at 03:00 PM EST
Valerie Bertinelli is kissing and telling: In a revealing new sit-down with Oprah Winfrey,
the actress and Jenny Craig spokeswoman says that she and ex-husband Eddie Van Halen cheated on each other.
"I cheated," she tells Oprah on the episode
airing Feb. 25 (via Entertainment Tonight
). "He claims to this day that I cheated first, but I don't know. I don't know about the timing."
Bertinelli, 47, who's promoting her tell-all book, Losing It: And Gaining My Life Back One Pound at a Time
, also reveals that her ex, with whom she's now friendly, wanted to take their relationship slow – at least at first. "He didn't want to sleep with you," asked Winfrey. Responded Bertinelli: "I know ... I wanted to sleep with him ... and he wanted to talk to my dad first."