Today's idiom is "bend the rules".
This means to change the rules just a little for someone.
A. Sorry, but we don't allow children under the age of 12 to ride the roller-coaster.
B. Please! My son will be 12 next week.
A. Alright. I'll bend the rules this time.
I'm not supposed to eat chocolate on my diet, but that cake looks so good, I think I'll bend the rules today.