What bike shops do you have in your area where you could try out some bikes. Just for a couple of examples (there are more)-you can get a women's bike in Trek's FX series and also Specialized Sirrus. Both brands can be had with a step thru frame or more standard triangle. LInks:
https://www.trekbikes.com/us/en_US/b...AfacetGender2# &
https://www.specialized.com/us/en/sh...irrus/c/sirrus Check to see who carries what in your area, then do a search for that brand of bike, and you'll most likely find lots that will meet your needs. The links I provided are just two of the larger brands-and the bikes are in their "fitness" range. Sounds to me like bikes in the "fitness" category may be what she's looking for.