Dream about killing sister signifies your impatience. You need to release some guilt or clear your conscious. You need to be more frugal or conserve your energy. The dream is a harbinger for fertility or immortality. You need to come clean about some matter.
Killing sister dream is an indication for hugs and kisses. There is something or someone you need to face. You are moving too quickly in delving into your subconscious. It stands for inner riches, untapped resources and unexpressed talents. You are making the same mistakes and reacting the same way.
If you dreamt about killing sister:
The name of the game today is action. The air has cleared, and it feels like a weight has been lifted off your shoulders. You might experience a sudden burst of physical energy, pushing you to get out and walk or go for a long bike ride. Enjoy the wind in your hair. Release your pent-up emotions in the open air.