Croc Hunter Betrayed!

Crickey! TV Crocodile hunter Steve Irwin 's merry widow, Terri, has been swept off her feet by his Australian bestie - married actor Russell Crowe!

The Pair has finally gone ppublic after "several months: of dating on the sly, a friend, who insists they "can't fight their feeling any longer," says.But some pals suggest Irwin, who died at age 44, when a stingray barb pierced his heart in 2006, wouldnt't be pleased by the romance. Steve was a traditional family values guy devoted to 

Terri, 51, and his kids Bindi, 17, and Robert, 12 - and would be devastated his wife has become " the other woman," an insider says.

Read more on this SHOCKING story of betrayal in the latest issue of GLOBE!