Sheri, wishing you and your mom the best! As for the vaginal/rectal issues, I had that and it seemed to be caused by my bladder cancer. When I was diagnosed with CIS, my urologist said that this could explain all my symptoms. When I was recovered from my first BCG series, those symptoms were GONE.
Don't know what Pat may have explained, but I understand that sometimes pain/discomfort is NOT where the problem is...but is sort of "reflected" from elsewhere. I wouldn't be surprised if your mom's issues were not due to bladder cancer.
And, I will only echo what Mike and several others have mentioned. A second opinion and an exploration of options for the bladder replacement would seem to be essential. Your mom will have the possibility of a long life, and the right choices now will make that long life a pleasant one!
Sara Anne