Thanks everyone -I've jotted down your suggestions. Need to consolidate and discuss with the specialist.

Just wanted to share an Update -
My mother went for getting her RT planned today (although we were also expecting the first shot to happen).. they have done some inking on her face to pinpoint the area needing treatment. Also asked to increase her liquid, semi-liquid intake. Did not really talk about PEG tube or other side affects today.. perhaps, they will take a wait & watch approach as the treatment proceeds and how her body reacts to it!

Besides, she sounded really upset as ink markings will prevent her movement outside home now. At least, I've seen quite a lot of change in her disposition since the diagnosis. It really hurts to see her lost in some unworthy thoughts (which even keep on bugging rest of the family as well). I don't think that it is something unusual but I'm sure that it can act counter-productive in further treatment.

Waiting very apprehensively of her reaction after the 1st RT shot on Monday..