Option one:
If she has over $15 in Westjet dollars, use that on your next purchase (you may have to call to use that method)

Option two:
If you find value in the companion passes, get a second WestJet credit card for her.
Also with $5000 in spend on that second card, you'll get $450 in Westjet bucks to add to her pot.

Up to 450 welcome WestJet dollars could be yours with the WestJet RBC® World Elite Mastercard‡.2
That’s potentially $450 off the base fare of your next WestJet flight. New cardholders will receive 250 WestJet dollars after your first purchase (within three months) and an additional 200 WestJet dollars if you spend $5000 CAD in the first three months after activation.2