Thanks a million. At $199 (yes, International trip) change fee, it would make more sense for me to get a refund for her flight and rebook her entire flight.
I thought as much about only trying to use inbound leg. Looks like refund is the way to go.
That really is the best solution, provided there are no other repurcussions?????? (are there??) And then I can book her a flight for a week later, coming back with us as planned.