One reason for your sibling's behavior may be her sign. If your sister was born between June 21 and July 22, she's a Cancer according to the zodiac. This means that she might have a tendency to steer clear of making any rash decisions in fear of making the same mistakes she did in the past.
That being said, there are many positive attributes to Cancers that you can likely appreciate in your sibling. Cancers are always willing to lend a helping hand and can be incredibly nurturing. These individuals are also excellent at managing their feelings and making sure they don't become too emotional when it's not appropriate.
Your phone psychic may be able to give you further insight into Cancer, as well as other zodiac signs. During a psychic reading, you might also be able to learn more about your own sign and how it influences your daily life.