Dear Pied, Everybody is saying all the sort of things I would say, so have not added to the list. I think you are doing everything you possibly can and I am sure your Mum senses your presence. Just go with your gut instinct re school. If it helps you to have some distraction, go in, if, however, you are going to spend time feeling guilty that you are not with your Mum, don't.
Just wanted to share something that always helped me. I had an "honorary aunt" once who was blessed with second sight. She had the most amazing impenetrable eyes. She never used her gift to earn money and was very careful with whom she used it. She told me and my family the most amazing things, which didn't make sense at the time but later on did.
She had asthma and suffered with chest problems in old age. There was one memorable night that she was so poorly that she passed over, but the time wasn't right and she had to go back into her body. However she shared the experience with us and said it was so beautiful she didn't want to come back......
I often think that perhaps hell is perhaps here on earth and heaven the better life awaiting us.....
Hope I don't upset you - I always found the comments from my dear honorary aunt to be a great comfort.
Love to you, your sis and your dear Mum xxxxxx