Hi Jazz, seems rather drastic not to allow you to see your mother....without prying into your circumstances - does she have a valid reason which she can prove and which would be detrimental to your mother if you were to visit?
Bear in mind, I'm in Scotland and our PoA documents are slightly different, but the 'health & welfare' section of my hb John's does state that I, as attorney, can decide who he associates with, where he lives, what he wears etc etc. This of course is in the event that he IS UNABLE TO DECIDE FOR HIMSELF OR WOULD MAKE A BAD DECISION.
I always find it alarming that some people seem to think that being an attorney gives total power to 'take over' the grantor's life!! Unless there is very specific wording which relates to 'all decisions' PoA is designed to give the attorney authority in the event of the grantor's inability to act for themselves, I would imagine that for the 'health & welfare' part it would generally come into play through illness of the grantor.
The financial part can be for any reason, eg health, grantor being abroad and unable to sign documents etc.
Your sister cannot forbid you to see your mother without good reason, not simply because she's having a bad day or throwing a paddy.
hope you get this all sorted soon.
Lots of love, Necion. xx