Well ... Miss B ...
In this dilemma on how to approach the parents one might have to decide which of these two verses takes precedence, especially if they refuse to grant permission:
Acts 2:38
38Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit.
or
Exodus 20:12
12 "Honor your father and your mother, so that you may live long in the land the LORD your God is giving you.