hightower,
Belly bands work nicely when worn low on the hips and paired with dress pants, if she's not into midriff-baring styles. They also work for buxom women when worn high-&-centered on the torso, just under the "shelf" where the blouse is loosest.
If she
is into midriff baring styles, consider a Galco Ankle Glove, a comfy ankle holster. It works well with the wide-legged or flare-bottomed jeans a lot of young women like. Be sure she understands the chief drawback of ankle carry: you cannot draw from an ankle holster while running away from danger.
The important thing to hammer home for her is that she must not get hung up on what she
can't do, but focus instead on the things she
can and
will do. It's easy to get discouraged with the list of, "Well, I can't do this, or that, or ..." -- but women have the incredible advantage of being able to choose from many, many different clothing styles, where guys are pretty well stuck with one of about three basic looks. Encourage her to be creative in her clothing choices!
Swing by Limatunes' Range Diary,
http://web.mac.com/mj_lauer/iWeb/Ran...y/Welcome.html -- the site is written by a very slender and attractive young woman who does an awesome job detailing how she dresses around the gun
and still looks slim & sexy.
Hope this helps.
pax