Im 16 years old and Just yesterday i walked into my brothers bedroom at around about 12 midnight.
My brother is only just 14, when i walked in he was masturbating on porn on his PC, the irony is that he is a genius (He gets straight A* in everything, without trying).
When he turned around and saw i was in his room he almost had a fit and begged me not to tell mom.
Now i don't know what to do, i mean should i tell mom or should i blackmail my brother and make him run errands for me.

Also if you were a mom what would you do to your 14 year old son?