If she wants to ride really bad.. Let her keep riding. I don't know your area, but if she's headed to the corner store for milk, have her take the bike. If she's going to check the mail, have her take the bike, any small errands. Get her some small saddlebags, so it's more convenient for her to use.
The only thing that will make her a better rider and remember all the things it takes to ride a bike (i.e. put your feet down when you stop) is for her to ride her bike as often as possible. That's a beautiful Speedmaster by the way!
I first had my wife ride her bike with me around our block, and then down to the corner store. Then, when I saw that she was pretty comfortable at that, I had her taking the bike on her own around the block and to the corner store. When she was comfortable with that, we signed her up for a beginner's MSF course (Glad your wife took that.. you learn alot, and they are pretty fun!). She then went and got her license. Then we started going on farther rides around our area, 30-60 miles or so. When she got comfortable with that, I had her start riding with me into San Antonio, on the Loop, on I-10, etc, down town traffic also. Exposing her to all kinds of situations. I can say now, that she is a very, very good rider. I have absolutely no problem with her taking her bike anywhere. Oh.. she also moved up from her 750 NightHawk to the 1200 Trophy she now owns..