Peter used Zachary and Serenity as an example, but his wife, Serena Bell, rebutted with the fact that they were destined to have a daughter.

On the other hand, she and Peter most likely did not have the same luck.

She and some other wives of the York brothers refused to have a second child.

Although Serena also wanted a daughter as cute as Callia, she dared not try for fear that it would be a son again. It would be more troublesome if she turned out to be pregnant with twin boys like Hayden