Now that you are 21, your mother sits down and tells you, "When you were born 21 years ago, the master--your father--promised me that he would set you free when you came of age. Your time has come. I want you to go and remind him of his promise to me. Tell him I expect him to do the right thing."
Tell your mother you can't leave her
Ask your mother to talk to the master for you
Go to see the master