He cancelled treatments. He along with his wife, fully believing in medicating my Mom with the help of Hospice to the point that she could not hold her eyes open, sip water, eat, talk, and dehydrated her to death. She died of dehydration and lack of care. He would not allow my opinion to be expressed. Yelled and threatened my life.
Is he the person she chose to make her medical decisions if she was not able?
Please note, cancer [depending on the Stage] can take a major toll on a person. Sounds like your Mom's body was shutting down. No way to stop that. When that happens, a patient just cannot eat or drink water because the stomach stops digesting and water would just sit in the kidneys, thus very painful.
Also no one goes onto Hospice until the Hospice doctor declares that the patient only has a short time to live.
I've never seen "dehydration" as the cause of death. May I ask what was the cause of death on the death certificate?