Hiya Peter,
I think Connie may be away on holiday, so will not be able to reply just yet.
I think that all you can do is reassure Julia that you will be there for her, that you will make sure that she is OK, that you will go on caring for her as long as you can. None of us know how long we have to live, so we all should make the most of each day - so tell her that that is what you two are going to do, and that she need not worry about the future. It must be difficult if you are having difficulty sleeping and suffering with depression. Do you have a digital camera? Make yourselves go out, doesn't have to be far, and take pictures of having fun; then you can look at them together and say that's what we enjoyed today, this week.
You both have to live Norman's Day by Day, looking forward and worrying about the future is not going to change it.
When you get back today, let us know what you have been up to - I've just been out for a walk with my dog and my son, it is a glorious morning.
Take care, and have a good day.
Love Helen