>>33642013 (OP)
Mummy shaped you into a neet. You never chose that, but it is your responsibility to get out of that hole.
Talk to the aunt, bring evidence so she knows to take you at your word. Your mother lies, so she needs proof that you didn't take after her.
Do what you can do.
You can try the hail marry approach like
>>33642035
But imma save you stress, it won't do shit. You can't speak a full blown meth addict out of addiction. You aren't a professional nor experienced enough to be remotely influential. Son or daughter be damned, meth is fucking METH. IT REWIRES YOUR BRAIN.
Don't say a word to mummy, let her do what she is doing because now that you know what's going on you can predict what she's going to do. Makes it easier to navigate because there aren't a new variable (You)
You need to be machiavilion if you want any hope of a clean break out of your fucked up situation. You can't stay there unless you want a fate worse than death
Speak in private with the aunt, demand privacy and trust, and coordinate an escape plan. We don't have institutions anymore so nobody is coming for your mother, all you can do is save yourself and hope she chooses to get her shit cleaned up by her own volition.
Control from the bottom is the play, you don't reveal what you know or tip off the addict, it won't work. It will hurt. Sorry you got delt this hand anon.