Dream about killing family members is a hint for your difficulty in communicating with a person. Sometimes you need to go against the system. You need to distance yourself from others or from a situation. This points at your repressed instincts. You are afraid of losing something that means a lot to you.
Killing family members dream is a harbinger for realization of your goals or dreams. You are obligated to someone. Some unfamiliar feelings or thoughts may be breaking into your peace of mind. This dream is an indication for an unacknowledged aspect of yourself. Perhaps you feel that you are undeserving of the things you already have.
If you dreamt about killing family members:
If your partner seems to be something of a party pooper today, then perhaps they can be forgiven. If you can persuade them to come out to see a show or take in a comic movie, all may not be lost.