When Sun Cao saw that Ruan Chanchan was not saying anything, he turned worried. He immediately banged his head harshly on the ground and said to Ruan Chanchan, "I promise that I will serve you and Zeqiu all my life as long as you treat my daughter."
Sun Cao was all alone. The woman who had children with him had moved on with another mer and was now the mother of ten children, two of them being boys. Clearly, she doted on those children more than the sickly child that he had given birth to. Sun Cao didn't blame the woman, as he knew that strong children were the pillars of the tribe and every woman wanted strong children to continue their legacy.
The child he gave birth to was too weak and couldn't awaken her beast form. When his partner saw that she was useless, she moved on with another mer who could give birth to powerful children. Sun Cao did not have any grounds to stop her and could only raise the child himself. Anyway, this was something that happened all the time.
