Breaking the news to your. . .?

[~*Flick*~]

Alright, I've asked this question before, but I am hoping there are different people on here to help too. I have a stepson living with my husband and I, who is 15. We live on one side of the US, the mother on the other. Since he has been with us, nearly a year, the mother hasn't paid a dime to help support him, nor has she even sent him X-mas presents, or anything for his B-day or anything at all for that matter. She keeps telling him she either sent it and it got sent back, or that she sent it, or she is going to send it. She lost her job due to issues which include drugs, and left her husband and moved into her boyfriends parents home. It is a small town she lives in, so he isn't a big time guy, but everyone knows to go to him for serious drugs. She is still jobless, might as well be homeless, but wants her son back because he said he wants to move back with her (and she doesn't want to pay child support.) She had recently visited a place that was about 3-4 hours away from us, but when I invited her to stay at our place (not because I wanted to, but I felt it would only be right for my stepson,) for the weekend (he was talking to her on the phone while I asked him to ask her,) then I asked if she wanted us to meet her part way, again she said no. She hasn't seen him in nearly a year! Up until this, he had for the most part been living with her and this is the first time he has lived with us for this long (although when he was 3, she dropped him off at my husbands house and disapeared for about a year without staying in contact.) She is getting her days mixed up, calling and sound strange (as if she is doing drugs right then,) freaking out on me because I wont give her a day she can get the plane ticket for to have him go back to her (I used to ignore it out of respect to my stepson, but now I am blunt with her and do not take her crap.) My husband has even had to call her and ask her where does she think she has the right to talk to me, his wife, the way she is. He made it very clear that unless she can talk respectably to both of us, we will hang up before she really gets going, which we do. He really wants to go, well, maybe not so much anymore, but he still does. The thing is, is he doesn't really know whats REALLY going on with her, she just keeps telling him how she is sick, as to why she sound different on the phone now. Up until he told us he wanted to go back his mother rarely called, and it was him calling her, but now she calls about once a week. Now she also failed to appear to court that was last month for child support, and now the next court date is coming up so who knows if she shows! I will add he has had friends from the town his mom is in asking if she is doing drugs, but we plan to soften it up a bit by letting him know she isn't making the right choices right now, nor is she in the right situation etc to care for herself, let alone a teenage boy. What would you do, would you even consider sending him back? Would it be THAT wrong to not? This is really getting on us, and we need a little support and help on this. It is a very big deal to us right now.