I've read that the new pouch can stretch .... if you constantly overeat - but it won't get as large as her original stomach was.
There is a 20% risk of signifigant weight regain after wls and it sounds like your friend is falling that statistic. :(
I definitely think she is eating too much food.
Wls is not 'the end' of your weight loss problems - it's just a TOOL to help you lose the weight. But if you abuse it .. well, you won't have a good result. After you hit goal - you need to continue drinking the water, watching what you eat and exerising .. or at some point you will have signifigant regain.
You should read 'Weight loss Surgery for Dummies' - it will give you some excellent information.
If you want the RNY - then get it - but know what to expect.
Everyone does not have complications etc. I got the RNY haven't had any at all and yes, I can eat meat etc..