I think you should share a bath together and, with her watching (or helping) you should shave or trim your own nether regions. If she is going to do it, that will be the time.
If not, get over it. Lots of women do not shave or trim. I've had waxing, electrolosis, shaving, sugaring and frankly it's lot of maintenance and discomfort.
If you have a nose-hair trimmer - ask her if you can trim for her ... gently.
Nose Hair Trimmer
Or try this gizmo, it trims/shaves and will not cut or nick her.
Finishing Touch Hair Trimmer