To see your sister in your dream symbolizes some aspect of your relationship with her, whether it one of sibling rivalry, nurturance, protectiveness, etc. Your sister may draw attention to your family role. Or the dream may also serve to remind you that someone in your waking life has characteristics similar to your sister. Alternatively, your sister may be a metaphor for a nun. In this case, she may represent some spiritual issues.
If you do not have a sister and dream that you have one, then it signifies feminine qualities that you need to activate or acknowledge within your own self. Pay attention to the actions and behavior of your dream sister.
Refer to the [[themes section for emotions]] for a more in depth look at emotion symbolism.
To see your sister-in-law in your dream represents characteristics in her that you find within your own self. Consider also your waking relationship with her. If you dream that you are arguing with your sister-in-law, then it suggests that you are refusing to acknowledge or accept certain qualities of your sister-in-law.
To dream of a sister-in-law represents a compromise in your life that you are sensitive about or feel forced into. It may also reflect a compromise you've made with someone that leaves you feeling competitive, yet at a disadvantage.
To do sit ups in your dream suggests that you need to pay better attention to something in your life, like a relationship, school, work, family, or project. Alternatively, doing sit ups could indicate that you need to show more pride and confidence in your ability.