Thats cool, I got my girlfriend into riding an she got way into it. I hear you with the pace thing: constantly looking to see if she is ok or worse crashed...we did one ride (her first) at 6 Mile, from 27 to the canal and back and by the time we hit the twisties coming back she was cooked and crashed 3 times bumping into trees. She was laughing about it.
A trooper, she kept going.
Days before that ride I told her that its not a matter of 'if', its a matter of 'when' you will go over the bars. She hit that way early on in the ride and got over it....then went on and hit some of the less risky bridges and all the logs. It was an awesome day.
What a great way to spend time together. You get to ride, she gets to ride and she gets to understand what all the dorky bike talk is all about.
The ride ends and the mystery of man and woman continues!