My great-great grandfather went on a Mormon mission to Ireland. While in Ireland, he found a second wife. His first wife (born in England), wasn't overly keen to discover this young, attractive, and not particularly deferential new woman arrive in back of the wagon to their house in rural Utah. She made my great-great grandfather build a second house for his second wife and the subsequent children, rather than share a roof. When he wasn't there and people stopped by to ask "Where is Brother H--?" she would answer, "He's spending the night in Ireland."
I won't say that polygamist wives in 19th Century Utah had it easy, but they weren't doormats, either.