Sister 
To dream of your sister represents the bond that you both share. Either you are very close or you are often in conflict with each other. Perhaps your sister reflects the position you hold within your family and your feelings regarding acceptance. It may also imply that your sister and some other person you associate with share the same attributes. This dream may also be symbolizing a nun and therefore imply that you may be having emotional conflicts.
If you do not have a sister and dream that you have one, then it implies that you possess certain qualities that you have not discovered as of yet. Consider what the sister is saying and doing.
Sister In Law
To dream of your sister-in-law symbolizes attributes that the both of you may have in common. Also, contemplate the bond that you both share. If you are arguing with your sister-in-law, it may imply that you refuse to accept that you both have certain aspects or attributes in common.
Aunt
To dream of your aunt symbolizes the morals and attributes of your relatives. She may be a link to your ancestry and past. The aunt may also signify different personality traits that you possess. You may be accepting of these traits, or you may abhor them. The aunt may also represent a female replacement caregiver that you can confide in or relate to.
Niece
Seeking your niece in dreams denote unforeseen hardships and needless anxiety over the future.
Twins
To dream of twins signifies opposites and contrasts. It also represents good business, contentment, and loyalty. It may mean that you are either in an internal battle with yourself or in harmony with your different personas.
To see twins fighting in your dream denotes conflict between your conscious and unconscious psyche. It suggests that there are issues and problems that you are not resolving or have opted to neglect in your waking life.
Nephew
To dream about your nephew in a favorable condition suggests the possibility of being in a satisfying and friendly situation. On the other hand, to dream of your nephew in an unfavorable situation implies sickness or failure in business.
Relatives
To dream of the sight of your relatives denotes personal involvement with your family, and the emotions associated with them. This dream mirrors some aspects about yourself.
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