The funds transferred by you to your parents' or family members' accounts are not taxable in your hands or in their hands. They can deposit their cash, if any, into their accounts, if they are confident of explaining the sources with proper evidences. There is no need to declare all your previous 10-15 years' of transferred/repatriated money, provided the assets, if acquired out of such funds, are already disclosed.
What exactly is going to be the future decision is not easy to predict. However, all your earnings and repatriations will not be affected, if they are genuine and properly documented.
Your queries are general in nature. I suggest you may seek advice on specific issues.