Good luck to the pair of them.
Remember that ancient billionaire who tried to euthanize himself with Anna Nicole Smith? She was happy to do it. He was happy to have it done to him. It is a shame that the rest of his family and their lawyers didn’t agree.
Maybe Rupert has decided enough is enough and this is a more attractive option than a one way trip to Switzerland. Even at her age she probably still more than capable of killing him stone dead with a vigorous bout bedroom based Texan leg wrestling. If you are going to go you may as well do it in style and with a lady who can afford an expensive legal team to sort out the mess once the deed has been done.
Alternatively there could be a genuine attraction. He likes tall elegant younger women and she likes shrivelled-up little men, after all she was with Mick Jagger for a long time.