Fan's mother previously used the excuse that Fan Huang didn't have a son to coerce Chen Lijun into getting a birth permit, and then when the time came, she brought over a child from her relative's family.
To outsiders, she claimed it was Chen Lijun's child, and the household registration was under Fan Huang's name. Legally, that child would become Fan Huang's rightful child, recognized by law.
At this critical moment, Suizi brought up the birth permit, and Fan's mother suddenly remembered. Right, she could use the birth permit to disgust Chen Lijun a bit more.
Since her son began arguing with her, Fan's mother already saw that she no longer had any leverage.
Fan Huang's heart had completely shifted to Suizi and her mother. At this point, Fan's mother somewhat had the mindset of a cornered dog; if she couldn't be happy, she wanted to thoroughly disgust Chen Lijun.
"Did you get your birth permit?" Fan's mother asked Chen Lijun with a sidelong glance.