I think its the opposite, i tjink that shea worried id jiaoJoao gets pregnant soon it would be risky since she is young...

Mas acho que não é necessário, estou acreditando que ela engravidou na primeira tentativa 🤭

You can lead a horse to water but you can't make it drink! Also I think in this case the princess has a right to give fertility tonic for 2 reasons - 1 to protect the children's reputation after four years married without a child might cause people to talk badly about them especially Jiao Jiao and 2 she fell pregnant as a direct of Jiao Jiao's mischeivious little medicine chest.