My mom let my cousin show me 'call of duty'(it's a shooting video game)but now she won't let me do it again! My cousin doesn't know that yet, and now he keeps making plans for today when I play it again! But ofc I can't 'cause my mom hates call of duty! She thinks it's to violent, but honestly, it's not that bad. Plz help! 
P.S I need to know how to convince my mom.
