You sound very devoted Floridaman.

At the end, we worry that if we sleep, we might not be there at the moment our loved ones pass. Is she still able to talk to you? She already knows how much you love here because of everything you have done for her for all these years. I feel like she would want you to take the time to sleep and eat. When my mom passed, we would sleep in the bed with her and on the chair. It sounds like you only have hospice for help. Keep asking them for help (can they make her more comfortable, etc). My mom went unconscious long before she left us. If that happens, it is hard on us but we have to keep in mind that we do not feel pain when we are unconscious (and the groans could be of the unconscious sort I hope, if not, I do agree to ask if she is being given enough pain medication ). Again, your wife likely wants you to take care of yourself. Going without sleep will not change the outcome.