Valerie Bertinelli: Eddie & I Cheated On Each Other
02/21/2008 AT 04:55 PM EST
"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."