YES it is enough. How do I know this? I have been using a machine with 2GB for 6 months and I do more than your wife. I don't have any issues with spinning balls or crashes, and I run the latest version of Mountain Lion as smooth as butter. Mine is a 2011 1.6 GHz i5, 2GB RAM, 11-inch Air, refurbed from Apple. It seems you've already made up your mind, and that's a shame, because for your wife's uses, you could get away with something as simple as an iPad (without the Flash games of course), which has much less RAM. Either way, good luck- I wouldn't imagine you'd need it because anything you buy will be sufficient for her needs, and then some.