A.F.
She needs to cooperate w/ CPS fully & completely. Let them know she is willing to take a drug test and show proof of where her & her child live. Also, sounds like she needs to make her "sometimes boyfriend" a "never boyfriend" Sorry but it's hard to believe that you wouldn't suspect someone would have pot in the house they live in if you know they smoke it. I would just assume they have it and not take my kid there.
Good luck to your friend.