Rather than brewing a batch of beer she may or may not like, why not start with baby steps? Go to a liquor store that does the "mix-and-match 6-pack" thing. Pick a bunch of single bottles of beers she might like. Bring home 6 or 12, put 'em in the fridge and let her sample them. If there are one or two that hit the mark, then you'll know what to brew.