I already have a Power of Attorney for my father where I am the designated agent. It was notorized in Canada, but myself and my father are U.S. citizens. He has a wife (remarried 10 years ago) in California. We would like to most likely initiate a divorce, or sell his home, but she is also on the title. With that in mind, do I need to also pursue conservetorship? Can she do it without his signature, without me knowing?