She only has one son and will rely on him for her later years. She won't allow him to be perpetually led astray by Xia Nuo.
Yin Cui is very self-aware.
She understands that the conflict between her and the Xia Family will never be resolved.
If Leng Yan continues to stay with Xia Nuo and remains bewitched by her, sooner or later, he'll deny having her as a mother under Xia Nuo's influence.
There are many cases where men forget their mothers once they have wives, and she knows her son well. He doesn't have much affection for her, and he's deeply infatuated with Xia Nuo.
So the likelihood of him distancing from his own mother because of Xia Nuo is quite high.
She may be young now, and it's nothing to be neglected by her son. However, when she grows old and if her husband passes away, her husband's children will certainly not care for her as their stepmother.
By then, if Leng Yan also disregards her, her miserable fate is imaginable.
