The meaning of the symbols of step, sister, even and exist seen in a dream.

If a person dreams that he is marrying his mother, sister or any such person with whom marriage is forbidden is Islam-and such a dream is seen in any of the sacred months of Thil-Qa’dah, Thil-Hijjah, Muiharram or Rajab-it means he will proceed to Makkah and Madeenah. But if such a dream is not seen in any of the said months it means he will treat his relatives with kindness and serve them well.

If his relationship with them was estranged, it will be re-established.... marriage to one’s mother, sister etc. dream meaning

(See Evanescence)... non-existence dream meaning