I have an inclination to slightly believe this guy. If you look at some of the posting styles and sentence structure of the posts they're not too consistent with how he's typing now.
Still, shared accounts as well as multiple accounts are a no no. Get your brother to make his own.
Also if/when you do get AV'ed make sure your younger brother does not have access to the account. It's a BIG no no and can get your AV status revoked (temporarily until you fix it or possibly permanently).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE