Hi Lori: no one knows for sure, but since you asked, I think the end may be near. I don't know, maybe I am not supposed to say that here. My brother and a friend from work both had lc and had siezures near the end. They both finally died after a siezure. If it were me, I would be going all out to make sure your mom has the comfort drugs. Try to connect with her as much as you can.
It is hard to know when to quit fighting. For me, I will draw the line when and or if I reach a threshhold in terms of quality of life. You and your mom have my prayers.
Don M