Heidi Klum and Seal (AFP)

German supermodel Heidi Klum and hubby Seal have revealed the secret to making marriages work.

The celebrity couple insists that when it comes to making a relationship last, both partners need to take time being"the boss".

With busy careers and two children, with another on the way, British singer Seal insists that taking turns being the'boss'in the house is what sustains their relationship.

"One time she is the boss, another time I call the shots. We have two kids now with the third on the way. We have to make sure that our relationship endures," Contactmusic quoted him, as saying.