What do you mean a mother depends on her children?

In the past, "mother depends on child" refers to a family with wives and concubines. The husband lost his son and his status improved. Or the son is a big official and the mother has a prominent position. Obviously, this is not suitable for the present family. "When I say that the mother is expensive, I mean that the mother has become expensive (that is, valued) because of the birth of her son.