The YouTubes I've found don't have the best sound quality, but you can get and idea of her technique and skill from these:

Kate Wolf:   Looking Back At You   Nina and Rick Byars are both backing up Kate, who is also playing guitar, but the fancier lead is mostly Nina, who is seen in close-up during the instrumental break at about 1:34 in the video.

You can hear Nina backing up Chris Webber in a house concert here: Canyon Acoustic Society house concert w Chris Webber (vocals) and Nina Gerber (guitar)

The sound on this YouTube video is a bit distorted, but the video really shows off Nina's nimble fingers and style: