I loved AXH's mom, who passed before his addiction really grabbed hold of him. I think that if we had found ourselves in a similar situation, I would have been tempted to issue an invitation to her to come stay with DS and I for at least part of her visit.
I guess I still have a bit of growing up to do, because while part of that invitation would have been so we could spend time with her, another part of it would have been so there could be no hiding that her son was not currently living with us. I'll have to think about that part of my personality a bit more.