Li Chengyun is very principled and will only give a person one chance. Once they dare to overstep again, given Li Chengyun's character, he will certainly not let them take advantage of his kindness and expect payback.
Therefore, Liu Yuying's end turned out to be even more tragic than Liu Yufeng's.
This Auntie Cui, despite the brothers of the Li Family verbally considering her almost a mother, the attitude of the two of them implies their acceptance is reluctant and dissatisfied.
Moreover, one can also tell that both of them harbor quite a bit of discontent towards Auntie Cui.
Given Li Chengyun's personality, if Auntie Cui steps out of line, although he wouldn't be ungrateful enough to take her life, he certainly wouldn't let her be so rampant in his presence.
But why does he tolerate it?
Yu Jingrong feels it's not that Li Chengyun doesn't want to deal with her, but rather he cannot, or to be precise, he is unable to deal with her.