I think she's OK with recording, but didn't want to go out on the lengthy tours. BTW, there is an alternate track on the DVD-A release that features the band members giving a running commentary of the songs, and I believe she's on that as well. It's a neat feature to have, since they can explain a lot of the music as its playing. They often start off with a demo version of the song and then segue to the recorded version on Rumours.