Thank you for putting up with the nonsense purveyed here on this issue. My late wife also died of cancer and while she didn't die of starvation or dehydration (that I know of), she didn't eat or drink for the last two weeks. She was hydrated with an IV which carried the painkillers, but you are correct, that doesn't affect thirst. She just didn't have any.
It is odd; that had never occurred to me despite the nonsense perpetuated here for the last two weeks.
It is something I think of too often. The thread was a constant reminder of our last few days together.