Upon hearing what Cheng Su said, Mother Cheng's eyebrows knitted together. Although the words seemed to make sense, on the other hand, being married and living with one's husband is quite normal. Not to mention that Qi Taiguo is a military man who scarcely gets a holiday to come home. If they don't live together, when in the world would they be able to have a child?
Moreover, having children is what's important. Since ancient times, a woman gains confidence and secures her place in her husband's family only after giving birth to a son!
Now, although it's not the old times anymore, given Taiguo's military status, it's still sensible to have a son sooner rather than later.