Replying to Am I Beat?

Ok so my little brother quit skiing for smoking weed and all he does is smoke. This has been going on for since the summer. I bailed him out of so much trouble that its pretty incredible. And just recently hes been doing other stuff like morphine and methadone which is really beat.
And whenever im not home he always takes my stuff and steals from me.

So last night my mom finally caught him and gave him a drug test and he failed for THC and Methodone (synthetic heroin). He kept denying the fact that he did methadone and told my mom to give him a new test.
This morning he asked me to piss for him in a cup. I wasnt tryin to be a dick, but i was sick of all his shit and lying so i said 'no'.

Was that a beat thing to do?