It's mad how you can think about people from a forum, when, like me, you're only an infrequent visitor, but that's exactly what I found myself doing the other day after reading this.
If it turns out to be the worst case then make every moment count. I had a relative snatched away in the space of a few months just a couple of years ago, time is precious is the only thing you can take from things like that. So if it does turn out to be that - and even if it doesn't - make them memories because they'll be the ones you still have with you in 20, 30, 40 years. I really hope it turns out well kj, everything crossed for you and your mother.