It is very common for a caregiver to experience feelings of denial when it comes to seeing a loved one decline in health. Most likely, your father cannot bear the pain and anguish of seeing his wife's decline, and therefore it is easier for him to refuse homecare and in a sense convince himself that everything will be ok. Denial is not easy to combat and will often take time to work through. Although you might not be able to convince him to hire a full-time nurse, I advise that you take small steps to acclimate him to the idea of outside help. You may want to take an approach that is entirely indirect. Rather than convincing him that she needs help, angle your discussion by focusing it on him. Tell him that he has been doing such a great job with her but has been overworked and could probably use a break. Find an activity that he would really enjoy doing for a short period of time and have a private nurse come in for a few hours to supervise your mother in his absence. Your father may feel guilty for leaving her, even if it's for a few short hours, but there's a good chance that he may feel a great sense of relief after spending some quality time on his own. If he sees that she is being well taken care of in the home while he is away, and finds that your mother responds well to the help, this may transition him into hiring for longer periods of time. The goal is to find a compromise to keep all parties safe and happy. I would like to wish you and your family all the very the best in days to come.