Is sister a friend or not? What sister must do to her youngest sister!!!!!!

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I have a sister, she is 50 years old and ofcourse she is older than me. Im 33years old. I live her since when i was 20 years old and she is the one who send me into colloge and in return I look after her son.no boyfriend, no hanging out with friend strickly home and school. when i graduated she did not allow me to work, she told me that the salary that i got is not enough for myself and she can pay me well. I become his personal secreatry, a driver, a nunny and fulltime housemaid just feel it.and i dont know why i can't say no to her. When i was 32yrs. i had a time to used computer, then chat. i meet my husband in chat and after a year we decided to get married. he went to my place is far from his place 16,000miles away then he marry me. Turn to my sister again! SHE did not agree. what i did and she is having a fulse story about my husband and try to convinced my parents that my husband is not a good man for me. that my husband hurt me and treat me like a servant and this and that.... bcoz of that, now my father don't allow me to go to my husband's place and in my culture we respect parents alot and we don't like to hurt parents as long as we can. I love my husband very much!!!!! If you are in my situation how could you convince your father that your husband is a good person that he love me and I love him.