I understand FULLY.
Having lived with my father for the last 4 years of his life to care for him 24/7 as he died slowly from Huntingtons.
(A genetic fate i also share at this very moment)
https://terb.cc/vbulletin/showthread.php?288718-going-public-on-terb&highlight=
If anyone can make a MORE honest or informed comment on this topic as i can please stand up
edit: I also have my soul mate, and life long friend caring for me , i give him the option to seek out pleasures( emotional or physical )
that we as a couple can no longer share together , Maybe the OP`s wife should be treated more like a person and not so much as an excuse