Trek - I, too, want to be like my mom when I grow up! Well, almost - did I mention she's ornery, too? 
I have pictures of her on a bike 4 years ago at my DS's house in CO. Unfortunately, they are on the computer at work - I wll try and remember to post one when I get back to work next week. She's quite a character!
Thanks for your good thoughts - I have printed out your comments and will give them to her when I give her the trike.
"When I'm on my bike I forget about things like age. I just have fun." Kathy Sessler
2006 Independent Fabrication Custom Ti Crown Jewel (Road, though she has been known to go just about anywhere)/Specialized Jett