Dear Sue, you probably have NO idea how great your being the "caregiver to the caregiver" really is. Fighting through this can be a very isolating experience emotionally because generally there are very few people who have a clue about what the patient[and the caregiver] is dealing with. It would be great for your sister to get on this site, but you are the next best thing. Chances are the rad. txs will be hard for both of them. [I am in the "pro peg" group, by the way, as was our Surgeon, who did not give John a choice about one-he put it in during John's initial surgery]. At any rate, the challanges going forward for your BIL and your sister will be that of maintaining adequate nutrition and hydration and if you have been reading for 2 months, you already know that it's not going to be easy. I suspect that another challange for your sister will be how to deal with the physical drain on him during rad.- it will scare her alot. But it comes with the territory and he can recover from it- given time.
Keep reading and asking questions. There is a wealth of good information here to help people through this. And good for you for being there for them! Amy in the Ozarks