Children are indeed the foundation for them to stand firm in their husband's family, and with the support of their parental family, their future days won't be bad.
Therefore, bearing a son is a necessary matter.
Su Jingmo and Su Xixian both had good relationships with their husbands and now, hearing this, felt somewhat uncomfortable, but they understood the second sister's reasoning. They exchanged glances, both sharing the sentiment of enjoying a few good years before worrying about that.
Su Lan Xi, seeing their reaction, smiled. She had gone through the same stage and thus did not continue on the topic. As long as her sisters were aware, that was enough.
As for Su Xinyi, they gave her a few reminders, but they could not say too much, for fear of adding pressure on her.
Su Xinyi, however, did not consider it a big issue. Bearing children, let alone determining the sex, was not up to her; it was all a matter of destiny.