One way to gain more insight into the mindset of your sister and begin feeling better about your familial ties is to examine her astrological sign. If your sibling was born between August 23 and September 22, she's a Virgo.
This means that your sister is naturally discriminating and has a tendency to judge others, although she doesn't mean to offend. Virgos are perfectionists and they often have high expectations of others - some that can't be fulfilled. If it seems that your sister is constantly looking down on you, keep these traits in mind.
Virgos also seem to hold strongly onto their morals and values, which your sister might be pushing onto you. Try to keep a level head when she acts invasive.
Speak to your psychic advisor if you're interested in learning more about Virgos. A psychic reading can help you gain insight into your sister's mind frame and better understand her personality.