Nikolas

I live with my girlfriend and her parents. They have a six year old child in which they are subject to take care of. Now they have been on my *** for quite sometime about being on drugs in which I hold a stable job making good money and am currently looking to buy my own house. I am not on drugs as my company does frequent drug tests. Would it be spiteful of me to call the police on them whom are showing obvious signs of meth use and leave their weed on my side of the house? One is a felon and the other one s teeth has rotten out from dope. I don t really give a ahit about drugs but there is a six year old in the picture and my only concern is the kind of environment this kid is exposed to and what it will affect later on when the kid reaches it s teens and or young adulthood. Plus what if something happens to that child. It s not my child but I love that kid to death and don t want it to make the same mistakes I did growing up. What would be my best course of action??