First explain to her that "weight" is a non-issue. BF% or the way you look in the mirror is the bigger issue.
As far as how she can "lose weight and
gain muscle" that's way way WAY too broad of a topic to go into. I would suggest first searching through the boards about diet and nutrition because without a good diet that weight is not coming off. Then search for good weighlifting routines because they have been posted numerous times.
With a good diet and a good weighlifting routine she can drop her BF%.
edit: Good golly I can not spell
