Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
Who signed the Charge?
This is complicated by the fact that your sister signed the Charge and that you are the two attorneys for your mother which could raise concerns about the whole arrangement.
IN order to minimise the risks you should arrange for your sister to pay the money into your account and for you to continue to make the payments directly.
Please ask if you need further details