I do have a mixte which I was building up for her, and I guess my answer is to finish that. It's not as light as I could like, but it'll be better overall than her mtb. It's a bit of a Frankenbike, having started with the remains of a low end 70's Jacques Anquetil that I pulled out of a hedge. It still has the original deralleiurs (we'll see how long those last!), and centrepulls, but I've replace the stem, and the new one I've installed backwards, bringing the bars closer instead of further away, and also put on north road type bars. It's also got an odd mix of wheels from other bikes (the ones on it had been kicked to crap) and a nice wide saddle. It may suit her, but I still have a hankering to put her on a really sexy bike!