Almost bought her a road or cross bike a couple of years ago and now I'm glad we didn't. She's highly unlikely to ever go on long fast road rides.
She will mainly ride the bike to run errands in the city, and to ride beginner level dirt trails with our kids. I'm trying to decide what kind of bike to get her and debating between a hybrid/urban bike or a HT. I'm leaning towards the HT as she likes the more secure feeling of wider tires on a MTB.
So the one thing that I've noticed (it's been a long time since I was in the market for a MTB) is that there are now three different wheels sizes. I don't think she'll care too much which wheel size she has. The main thing I'm concerned about is buying a bike and finding out that the wheel size we bought for her is the one that does not survive and it's harder to get tires and tubes for it in the future.
I'm seeing that most HT's are 29'ers so maybe I won't even have a choice. Any comments on the whole wheel size issue? The 650B size seems interesting but I'd hate to buy a bike with 650B wheels to find out in say 4 or 5 years that it's hard to find tires, tubes, spare wheels, or perhaps a replacement fork for that size.