Yay! Just an update. Today at pick up I finally sucked it up and had a talk with the mom and basically told her that I was thinking about she said yesterday morning about her son possibly doing better here over the summer rather in a different setting. And basically told her that I thought that her son would do better else where as he really isn't improving between both of our efforts. She actually agreed with me and told me that she has decided to place him in a day camp for the summer. Yay! So relieved that this went better than I thought. And I am so relieved that it is now confirmed that he will not be staying and be hopefully finding what he needs.
Thank you ladies for your help!