I understand you have the best of intentions, but I'd softly caution you not to approach her in that way. Most hoarders would totally freak out and, if not involved in the whole thing, will re-hoard very quickly. It's a psychological thing.
Check around on this board and do a little reading for ideas on how to approach this and do it without World War III. :)
Come to the daily posting board and other folks will have some ideas.