If you have seen the deceased sister-in-law in your dream: The disruption of a certain agreement, arrangement or cooperation may cause you to doubt whether you can achieve some of your goals, and even meeting with a person you have not heard from for a long time may create pleasant surprises. To see the deceased sister-in-law in your dream refers to news from your spouse's family, solving the problems in the family, feeling good and safe, a happy life and being grateful.