My sister on drugs, help.

So I have a sister. An only sister. I’m the oldest she’s the youngest 19. We’re 10 years difference, if also a mother and my mind set is way different always has. I’ve always been more about my parents, conservative, religious and scared to try any drug. But my sister in the other hand, a rebel, wild, is easily influenced online by trends and what she sees. Moving forward she smokes weed and she’s been into it for some years now. Then a aunt mentioned how she thinks she’s into ice or whatever you call it. I don’t know about drugs at all but the basic that they’re no good and they get you high. She’s became very aggressive the past 2 years, she’s very skinny petite and is always in a very bad mood and she’s very negative on everything I say even when it’s something like “pick up your dish and clean it” I’m super OCD, I’m a single mother and she knows I like to keep the house clean which she careless of the effort I do in cleaning all day and taking full responsibility of my son with no ones help... she gets very defensive on things like that or when I tell her to come home early. My mom works all day comes home tired and she never listens. Thankfully she moved with my dad but I’m very worried about her thinking what my aunt said might be true. That’s Why I post this here to see if anyone can tell me if it’s possible this is a sign...

she also owns a bong which my aunt said was a sign... she also does wax I don’t know what that is but I don’t know if that can be the reason of her being this way. Help!