Oh ((((((((((((( Patty )))))))))))))
I'm so sorry this has happened. It always seems as though there is one sibling that takes on the truly difficult situations with the parents and other siblings who "can't handle" it or don't have time *sigh*. How frustrating for you. Also not a good thing for mom to hear from her daughter...but then again...maybe she needs to know exactly where your sister stands....hard lesson but necessary maybe?
I do so hope you look into visiting nurses or hospice services. They should be able to help you in your quest to find time for you and your job too. How about contacting some churches in your area or even a seniors service that may have folks that can come in and keep mom company while you work??
There is almost always an answer to our problems out there. Sometimes its a matter of asking the right questions and keeping our eyes open to the possibilities.
*Gentle Hugs*
sabby