Also, what's the harm of an open window, or pushing her outside on a beautiful day? Even if his belief is that she will die tomorrow, what harm is that? He dienies her even the simplist of things.
There's a reason. He does not want her to get better. Why? (that's rhetorical)
What Michael? You don't want her to enjoy fresh sunshine or receive rehabilitation so she can relearn how to speak? Oh, and when she dies, you want her cremated IMMEDIATELY! Gee, I wonder why?