Who says things don't get hotter after marriage?

Seal and Heidi Klum bare all -- in bed! -- in the video for his single “Secret” (off his album Seal 6: Commitment, out Tuesday) -- and UsMagazine.com has your first peek!

Klum, 37, tells Us that it didn’t take much acting: “It's the story of two people in love. My husband is what I always wanted and never thought I would have."

 

 

Adds Seal, 47, "The song, the movie, it's the story of our love."

Klum, who wed Seal in 2005, has three children with the singer -- Henry, 5; Johan, nearly 4; Lou, 1, as well as a 6-year-old daughter, Leni, from a previous relationship.

"I feel so lucky to have found my husband especially at the time when I did," Klum tells Us. "He is both what I always wanted and never thought I would have."

Come back to UsMagazine.com Wednesday to watch the entire video; Access Hollywood will also premiere the video on its syndicated show.