My very deaf father in law has booked a 6 weeks holiday from Australia to England and Italy. He is travelling with his wife who has stage 6 dementia. He is not listening to anyone (family, doctors and her Alzheimer carers) regarding the risk of caring for her on this trip- especially with the long flight. Short car trips and overnight stays for my mother in law are very distressing for her. We are worried about him taking her through airport security or if she becomes stressed, angry or aggressive on the flight. We don't know how he will be able to go to the bathroom on the flight and leave her by herself or how she will be able to navigate the toilet by herself. We doubt he will be able to get travel insurance for her. Any ideas or thoughts would be appreciated.