I come from a Riesling area (Mosel), so I would fully agree. But there is of course a bit more to discover, some suggestions:
- Riesling grapes make excellent sparkling wine, if you get a one from a decent winery, it can easily compete to the mass market champaigns that cost a multiple...

-There is a Southern German and Swiss speciality known as "Schillerwein" made out of a blend of red and white grapes that tastes and looks similar to rose (but often a bit better as only higher quality wines are allowed to be sold under this name in Germany). Your lady might love it as most ladies do...