Wives (and women in general) had no rights whatsoever
Even though rape was considered a crime in most parts of medieval Europe, the particular laws governing sex were different when you were married. A wife could not legally refuse her husband’s sexual demands, but a husband couldn’t refuse his wife’s advances either. The popular belief was that women were always longing for sex, and that it was bad for their health not to have intercourse regularly. To make a long story short, women were seen (and used) as strictly for the purposes of sex, bearing and raising children, cooking and cleaning.