Uncle Yan’s son is at fault. The fault lies in not having the right values and not being grateful. Without the ability to distinguish right from wrong, the daughter-in-law's family will be shamelessly
to the extreme.
Uncle Yan and his wife are also wrong. Don't spoil your children too much, or you will be hurt in the end.
In the end, I don’t know if Fang Sijin will regret this business. This must be handled by Fang Sijin.