Our sister more like our parent

A girl takes cares of her step siblings after the death of their parents but their aunt who doesn't want them to be better than her children always interferes their live and doesn't let them live in peace . The girl has two siblings . A younger sister and brother They both study high school on scholarship . They both work on pert time job to help their sister. The younger sister's dream is to become a doctor while the younger brother's is to become a famous singer . They both like helping their elder sister . While the elder sis didn't get married or fell in love with anyone because of her siblings. She is very thankful to her step father who gave shelter to her and her mother after her biological father threw them outside the house and she wants to take care her step siblings very well.