study in UK

After my sister to study in UK, parents have been very is not assured, because the elder in study in UK after the first half of the year, never asked the family to live a money, call every time she always said that he is rich, but my parents are very worried about my sister the money illegally, mom and dad also let me clandestinely asked my sister come from money, but I promised my sister don’t tell my parents, so I can’t say that, because my sister told me, said that parents is not easy, she can’t ask for money, she is doing a part-time job to earn his living fees in the use of rest, so she is rich, but my sister is afraid of parents do not agree with her to do a part-time job so has not told them, it seems my sister is really very sensible.