My sister's and I went through the same thing with our mom and as hard as it was we had to put her in a nursing home because she needed around the clock care and it was just to much . I know it's hard but you have to not only take care of her but you have to take care of yourself as well. In the state of mind that she is in you can't leave her alone at all and my mom was at that stage so for her safety it was the best thing we could do. I think you know what you need to do but you are beating yourself up over that decision but I promise it's the best thing for al. ❤❤l