A Good daughter would have put a pillow over her mother's face & held it down...i was not that person and will regret it Always.
Oregon and Washington have death with dignity statutes, you might want to check out the requirements before the time comes. My ex wife's cousin was in The Netherlands when she was struck by a debilitating illness in her 30s, it allowed her to make arrangements for her family and not suffer needlessly in a vegetative state for years.