Family & Friends

Is it bad aunting/uncling if you let your niece/nephew sneak out?

So my niece has made a habit of sneaking out she is 16 at the age where she sneaks out goes to her friends front yard and records herself fighting other high school girls. Am I wrong for not telling her mother (my sister), or am I just amazed no one noticing the scratches or bruises on her legs and arms
It seems in control
Get it together
Select gender and age to cast your vote:
Is it bad aunting/uncling if you let your niece/nephew sneak out?
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