After Sha was born, Du fell in love with her. He would rather bear all the responsibility on himself than let her suffer any harm. He selfishly hopes that she can be by his side forever. Even if she can never become his wife, he still wants to keep her by his side. ——Cross
She fell in love with him the first time she saw him. It was enough that she could see herself in his eyes. She is willing to give everything for him, including her own life. --Yarn