Peace Farside,
This post is in regards to the supposed inequality between men and women in paradise. What you have mentioned is certainly authentic. In saying that, allow me to explain the meaning. When both a man and a woman die, the supplication that is read for the woman is: “give her a better husband than the one she had”. This is done in case her husband does not become an inhabitant of paradise, or she did not really love him on Earth. The man also gets the same supplication of : “ give him a better wife than he had” for the same reasons. However, the reason that a man may have more than one wife is that he would have had more than one wife on this Earth. Notice the word “may”. It gives you an indication that this will not be the case for every man.
A woman can only have one husband in heaven because while she was on Earth, she only had one husband. Furthermore, it is not of the women’s nature to desire more than one man in her life, while that is not necessarily the case for men!