Most disgruntled women dream of killing their husbands. I don't know if you're married, but you dreamed of killing your husband, which means you're playing a role. I don't know who you are replacing. It may be your sister, friend or relative, or it may be a virtual story protagonist. In short, it is the role of a dissatisfied wife. Psychologically speaking, your brain doesn't realize that your sadness is imaginary. In order to calm your negative emotions, your brain has arranged a dream for you to kill your husband to solve your grievances.