Dear Pied,
Your writing is beautiful, as is your experience and you are so right about needing this later. The fact that others can share your documenting, is by the by, as well as incredibly helpful and reassuring.
You will find no judgement here, my love, only deepest sympathy and respect.
It may be that your mum's tired body is starting to shut down, and you will see the changes, but know that she is leaving with love in her heart and peace on her mind and that is down to you and your sis. You have given her a gift, and you have done it with grace and dignity.
You will find the time to absorb it all later. Just be, for now. You and your lovely mum.
xxxxxxx