I'm falling apart dealing with questions from my mom that have no answer.

As some of you know, my mom went home from a SNF last week. She has 24/7 care. She begged to go home from the SNF and now she is begging me to let her live alone in her home (as she did for 35 years prior to her stroke). She calls me constantly to tell me she absolutely does not want a caregiver there anymore. It's not because of the caregivers' personalities or anything, she just doesn't believe she needs full time care. There is no point in reasoning with her and pointing out that she is in a wheelchair, can't walk or transfer, can't use her left hand. She simply says she can take care of herself. I block her number for most of the day to avoid the repeated calls, which of course makes me feel guilty. I see a therapist, I'm on an antidepressant, which was working well before this whole stroke episode. I don't know what to do. There is no way to answer her or reason with her on this topic. And of course it's heartbreaking. I know there's no answer, but I have been sobbing all day. I can't handle this.