Hello, Didier. This is not what you want to hear, but if at two weeks she cannot eat/drink easily, how do you/she think she will handle the next 5? I am a strong proponent of the PEG because even after the radiation is finished, there are mouth sores that hang around. That said, there are people who did it without a PEG, and I am sure you will hear good suggestions from them. Be sure to tell your mom that there are lots and lots of people who got through what she is going through who are happy and doing just fine now. It sometimes is easy to forget because when going to radiation, all one sees is sick people.
Joanna