Your boyfriend starts fucking you again, but another poistion. This position makes his dick easier to slip into your vagina and it reaches places not reached before. You haven't actually expected a vagina to go that deep.
You receive the hardest orgasm you ever had.
When you turn back to your mother, you must confess, you start enjoying being a girl.
Now, 2 wishes remain. Since you have been made to like being a girl, turning back is no longer a wish you have to keep in mind.