So....

A young couple gets married. They've both had some success but neither one is all that big. He is a little better known than she. They have about the same amount of money.

They do a project together and she becomes famous (and rich) because of it. Her claim to fame is their show, The Newlyweds. She parlays that fame (and her own talents, abilities, and appearance) into even bigger success and he is beside her every step of the way with publicity, special events, and appearances.

Pay the boy the money.

It could have gone either way. Being your Groom might have made him a $50 million man and you would have deserved half. So does he.