My dad had done up a will and Durable Power of Attorney after my mom passed away 4 years ago. Less than a month ago, my dad's girlfriend had my dad (who had a stroke 9 months before) change his will and also did up a new POA. The ink wasn't even dry and she advised my dad's children that she has POA now and the house will go up for sale and 2 days later she changed the locks and we no longer have the keys. We feel my dad is not able to make the decisions to change his will, but found out from a lawyer that it's a large threshold for competency to sign that. We just want to know what we can do, as we think he is being coersed into doing what his girlfriend wants. We have one of his doctors saying he is incompetent and another saying he is not. She won't let us visit him alone, and she puts the phone on speaker everytime we call. Is there anything we can do about it. His stroke in Feb 13' was a severe stroke still with incompetency.