You are so right when you say that you will always treasure the time you are spending with your Mum. As difficult as it must be you will never regret doing all that you can for your Mum, and Dad.
What a wonderful daughter and person you are to have taken such a big load upon yourself. I am glad that you are able to vent some of your frustrations to us here. It never ceases to amaze me how few people are able to empathize with what the immediate family are going through. As you so rightly say, it is happening to you too! She is your Mum!
Sending hugs to get you through and hope that you get to enjoy many peaceful times on the verandah with your Mum. Take care. Deanne ooxx