Don't worry, its usually not just one oncologist who decides what treatment. They usually have an online conference for each patient between a few nearby hospitals. Your mum might be one of the ones whose body really responds well to that particular treatment but sometimes you get a stubborn cancer and then the oncologists have to figure out another plan of attack. Your mum is a LONG way off dying, even though during chemo side effects she will think she is. I remember those day by day surviving days. She will get through it though.
I used to take my lap top to chemo. They do have extra power plugs behind the chairs. Get a wi fi modem and you are set. Use the time to teach your mum the internet. Make her an email. Lookout, she might really take to it and be a face book junkie like me lol.