What is sister wife meaning?

The term "sister wife" refers to the practice of polygamy in which a man is married to multiple wives at the same time, who are considered to be "sister wives" to each other. This practice is often associated with certain fundamentalist sects of the Mormon religion, although it is illegal in the United States and many other countries. In these relationships, the wives are expected to share household duties and child-rearing responsibilities, and sometimes even sexual intimacy with their husband. Sister wives may also develop close relationships with each other and share a sense of kinship, despite the inherent competition and jealousy that can arise in such an arrangement.