Guilty by shared apartment?

Hello, here is my situation. My friend lives in an apartment, in Quebec, with a drug dealer, who is growing pot and mushrooms in his room, with the door closed and locked. My friend is worried that if the police raid the apartment, she will also be charged with some drug related charge. Is it possible? She knows about the whole thing but the only drugs in the apartment stay in her room mates room with the door locked. Thanks.