One of four people can make the decision in most jurisdictions:
- The patient themselves, if they are of sound and reasonable mind
- The patient's next of kin, if the patient is not able to make the decision themselves
- The patients enduring power of attorney for health, and they can override the next of kin's decision on this
- The doctor themselves, if they determine that a resuscitation attempt would not provide meaningful quality of life for the patient - they can, but typically do not in most cases, override the above threes decisions (e.g., there's no moral or ethical reason to resuscitate a 100 year old severely demented individual who is bed bound, even when the family demands it)
In your case, the difficulty is the "next of kin" aspect - who has priority here, the husband or the child. That might take an actual lawyer to determine (but someone else might be able to chime in here).
