Durable Power of Attorney 3rd party protection I am my mother’s power of…

Durable Power of Attorney 3rd party protection
I am my mother’s power of attorney. She has a section entitled ”Third Party Protection”. My sister has been giving me a bit of trouble, and I was wondering if this section protects me from any action from her.

The section also states:

In no event shall third parties have any duty to inquire into or question the propriety of any act of my attorney in fact.