There are other threads on using enemas for weight loss.
THEY DON'T WORK.
NO ENEMA OF ANY KIND WILL MAKE ANYBODY LOSE WEIGHT.
Weight loss by enemas is a total fabrication and a myth (mostly promulgated by colon therapists and enema fetishists--maybe they are the same).
With an enema, you only lose weight of feces, which isn't fat.
LOSING FAT is the only way you lose real body weight.
Enemas only give you something to do instead of eating.
See these threads:
http://enemas4fun.zity.biz/forum/index.php?topic=14064.0
http://enemas4fun.zity.biz/forum/index.php?topic=24013.0
http://enemas4fun.zity.biz/forum/index.php?topic=345.0
It seems your friend is having metabolic changes and being a diabetic is also working against her.
Quite simply, no matter how much or little she is eating, if she is gaining weight, she needs to eat less.