Welcome to My Astrology Stars,
Your sister was born under the moon sign of Aquarius. Your sister’s Sun sign was Scorpio. Her birth chart shows her a very stubborn and very emotional person, she has a sense of security which forces her to stay alone. She doesn’t like to share anything with others whatever is going inside. Her birth chart shows her that she is career oriented personality, It tells us that she is having deep attachment with religion, her affiliation with religion and second thing is travelling. She is fond of travelling too. As your question is about her marriage, according to her birth chart she is going to get marry after 3 years.
Anything else you wish to know?