How can I talk some sense into someone??

you need to point out to your mum that if she doesn't take it easy she will end up back in hospital or worse still vitally ill.Point out to your sister that if she wants her mum to be around for many years to come that it is about time she gets off her sorry,lazy **** & pull her weight & help out.Is there any way you could take your mum to your place to recuperate?But then again when she returns home she will probably have a mess to clean up anyway as your sister hasn't done anything to help herself or others.Another suggestion is to email all the replies you get to your Question.