My understanding of Catholic teaching is what your grant aunt did was permissible under the concept of natural death. Under natural death, it is also permissib

My understanding of Catholic teaching is what your grant aunt did was permissible under the concept of natural death. Under natural death, it is also permissible to receive pain alleviating palliative medications. https://www.usccb.org/resources/ethical-religious-directives-catholic-health-service-sixth-edition-2016-06_3.pdf https://www.usccb.org/resources/ethical-religious-directives... (Part 5 Issues in Care for the Seriously Ill and Dying) (56) A person has a moral obligation to use ordinary or proportionate means of preserving his or her life. Proportionate means are those that in the judgment of the patient offer a reasonable hope of benefit and do not entail an excessive burden or impose excessive expense on the family or the community. (61) Patients should be kept as free of pain as possible so that they may die comfortably and with dignity, and in the place where they wish to die. Since a person has the right to prepare for his or her death while fully conscious, he or she should not be deprived of consciousness without a compelling reason. Medicines capable of alleviating or suppressing pain may be given to a dying person, even if this therapy may indirectly shorten the person’s life so long as the intent is not to hasten death.