my mother-in-law is jealous of the fact that i married her baby boy and helped him to become a man
a son's mother - who after he takes a wife, becomes jealous of the wife and considers her competition for the son's affection (which is gross and somewhat incestuous)
"my mother-in-law is jealous of the fact that i married her baby boy and helped him to become a man" What is the definition of "mother-in-law"?