How can i get a hold of nug without my mom finding out?

I live with my mom in an apartment i'm here only child, i'm 20. And i've been smoking since i was 17, however i don't really associate with the same friends anymore that i used to smoke with recreation ally. I've found that it's helped me sleep at night and it also helped me with my asthma and it just relaxes me and gets me in a creative mode. Anyway, how can i get a hold of it and smoke it without my mom noticing?