A variation of all this was in her advanced health care directive, but it was more
nuanced. She already had
no ventilatorin that, but wanted intubation or possibly even a tracheostomy in some circumstances but not others.
Now it's pretty cut and dried, and neither she nor anyone else in the family needs to worry about her being put on life support that she never really wanted.
Mom basically has two health care goals right now: die comfortably at home, and to live long enough to see her coming grandchild (he's due 15 September). Both might not be possible but that's her ideal.