He gets no sleep. He needs help at night with her. My Dad still works full-time during the day. My mom has dementia and stays up all night. My dad is not getting any sleep and can't function during the day. He is 83 years old. I need to find out if there is someone who can come in a couple times a week overnight to take care of her so my dad can sleep.
Have your Dad check with the Assisted Living facility to see if they offer night care. There would be an hourly fee. Or have your Dad check your Mom's primary doctor to see if there is anything available that will help her sleep through the night or at least a few hours.