Before the new season of "Project Runway" begins, Heidi Klum is thoroughly enjoying couple time. She's spending a relaxed beach vacation with husband Tom Kaulitz, filled with sunshine and romantic moments.

Klum revealed the expected "secret" to keeping their marriage "spicy." The German supermodel was previously married to Ric Pipino and Seal. Heidi Klum and Tom Kaulitz look like they’re on a never-ending honeymoon,

Heidi Klum is revealing her secrets on how she keeps her marriage to Tom Kaulitz spicy. "I mean we were just lingerie shopping," the supermodel, 52, tells PEOPLE exclusively ahead of her much anticipated return to Project Runway on July 31.