I Married Him for A Reason

TWIST AND TURNS AND GAME OF FATE is what this story is about!
*
She was going to suicide. But her fate was not to kill herself but to save his life. He was in need of an urgent kidney transplantation. Only her kidney matched and she donated it to him. His parents wanted to adopt her because of her sacrifice. But, in exchange of her sacrifice, she asked him to marry her. People thought her to be a gold digger but he always pampered her. Only she knew that she married him for a reason.

Now the question is,
What will happen between them after he finds out about the reason?