Dream about sister in law points to the lessons that you are learning from your life. You need to address some animalistic or primitive thoughts. You need to channel your emotions in a more effective way. This indicates your intuition or subconscious desire. There is a wall that is keeping someone from getting through.
Sister in law dream is an indication for your approach to life. You need to trust your intuitive side as well as your rational side. There are some issues or feelings that are eating up inside you. Your dream is a harbinger for your state of mind. You are dwelling on old issues.
If you dreamt about sister in law:
Be careful at work today, because someone will try to manipulate you in someway. Most likely, a co-worker of yours will try to “pull rank” and make it seem as if he or she knows more than you do. Don’t be fooled. Ultimately, trust only yourself.