If your mom has Alzheimer's then she is 'not of sound mind' I'm not sure how she can be in the process of divorce. Did her husband file and serve etc when she was 'of sound mind'? If her diagnosis coincided with the parts of the divorce that required her signature etc., you may be able to do a Motion to Set Aside. If the family members do not wish for him to continue to have a Power of Attorney then you and/or others would need to file a Conservatorship and ask the court to take the Power of Attorney away from the divorcing partner.
Answered on Jul 17th, 2013 at 4:04 PM