I feel your pain and this is a trial such as Job faced in his torment in the bible. I have often said the Lord does not give us more than we can handle but, there are times I have felt that praying for His strength to help me get through was all I had left.
Tough decisions do not get easier by putting them off. I pray God lifts you up in His plan.
There are very few people I tell this story to that I personally know. When I do they are always shocked and most ask me, “How the heck to you do it? How do you function?”
My response is usually, “I don’t know. I just do.”
Does your health insurance cover mental illness? Also, is she lucid where she understands you or is the dementia to a point where if you left her alone she would seriously harm herself?
Is it time for an institution where she can get round the clock care? This must really be tough on you and your family, especially having to make a decision which will impact everyone.
I pray for you and your family.