Spouses looking in
    one another’s wallet or purse
Question

                Do I have permission to look in my
      husband's wallet? Does he have permission to look in my purse.
Praise be to Allah.We put this question to Shaykh Muhammad ibn Saalih
    al-Uthaymeen, who replied as follows:
Does the other partner agree to that? If he or she agrees to it, then
    there is nothing wrong with it, but if he or she does not agree to it, then it is not
    permissible. 
And Allaah knows best.