To dream of your sister-in-law, denotes to features she has and those you find within your own personality. It is also very important the relationships you have with her in your waking life, as it could tell much more about a dream. If you have a great friendship with your sister-in-law, then you have good qualities within yourself and the ones you like in her.
Sister-In-Law dream meaning
Read more about dreaming of Sister-In-Law in other dream meanings interpretations.