Hi Iceberg, Do not panic on this, just give them the actual correct details in your PR application that includes your sibling info (even though they were married), spouse and children info (if you have) with your father and mother. They would not mind it coz, here the family situation can change at any time parents gets divorced etc. So, it does not matter. But at least now provide correct info to clear this. Also, say you got married once you got your study permit and your family equation might be changed, or your siblings got married and their family info might have been changed. So, I would say don't worry much on this and Wish you good luck.