Now my family has only one sister who knows nothing about you. (A) everything. But my sister does not have any comments for us to get married. My sister said that based on my decision.
Now My family has only one sister learns about you (US) everything, but my sister didn't have any comments we would be married. My sister says that based on my decision.
Now that I have my sister's family was only one man that I don't know about you (US), but my sister did not have any comments that we will be married. My sister said that it was up to me to decide.