Sibling trying to divorce parents using POA
I found reference on the world wide web to the assertion that an agent (aka attorney-at-fact, principal) can’t prepare a Will, vote or seek a divorce on the principal`s behalf at http://www.durable-power-of-attorney.com
Needless to say, I have a sibling with a Durable Power of Attorney (granted by my father before he was declared legally incompetent) who is now trying to divorce my parents. Is there some general legal reason (eg. constitutional, statutory, etc) that prevents someone (like my sibling) from using a Durable Power of Attorney to do just that (eg. divorce my parents). I am specifically looking for some legal doctrine, principal of law and/or previous judicial precedent that prevent a sibling from divorcing my parents!
It is hard to believe that someone other than my mother and father could divorce the two of them. After all, it was my mother and father who decided to get marrired in the first place. How could someone else decide that two people shouldn’t be together and then seek a divorce on their behalf?