Will Ferrell and supermodel Heidi Klum were recently left red-faced at a photo shoot - after the comedian's wife caught them in a compromising position. The unlikely duo recently got carried away while modeling for U.S. magazine Sports Illustrated's annual swimsuit issue to promote Ferrell's new basketball comedy Semi-Pro. And the actor insists wife Viveca Paulin chose the worst possible moment to walk into the studio. He recalls, "My wife walked in right at the moment when I was biting Heidi's butt. But she is incredibly accepting of all these things. She just rolled with it."