"He told me last night that he's been having trouble taking the mandatory 3 drugs test per week (urine tests). He said he has trouble urinating if someone else is in the room with him.
He told me that he's afraid they will kick him out of the house because he can't do this."
My AS tries the same line. The "trouble" is that it's much more difficult to substitute clean urine when someone else is in the room. Of course he's afraid they'll kick him out because he knows his urine is dirty, and he's setting the stage with you now for when he's kicked out.