Final rally?

Hi there, I'm new to this site and look forward to communicating with many of you. My mother and I have been caregivers to her mother/my grandmother for several years now. Around two months ago, she was designated as an in home hospice patient. She has already had several "rallies" of strength, always followed the next day by a marked decline in waking hours and energy. However, yesterday's rally was much more active than we have noticed in the past. She is typically wheelchair/bed/chair bound, and does not toilet without our assistance. In fact, for the past two weeks, we have been using a bed side commode at all times because she is too weak to safely transfer herself to the toilet or walk into the bathroom. Yesterday, she insisted on using the real toilet, and even stood at the sink to brush her teeth (with assistance and supervision). While my mother was fixing dinner and I was out running errands, she even stood and walked WITHOUT HER WALKER, which she has been unable to do since 2013, into the bathroom and back. Obviously, this gave us all a scare, but it can be impossible to supervise someone directly for 48 hours, even with 2 people. Anyways, today, she could barely get out of bed in the morning, slept all morning in a rocking chair, and even had an instance of fecal incontinence. She could not feed herself, and refused all but applesauce. We are worried that this is the final rally. What is your experience in this situation? Thanks.