If she went ahead and completed and filed the ticket, in a few weeks you'll be getting a Notice of Impending Conviction in the mail with a due date about six weeks after the offence. You can pay it by phone, on the web or at a bank, and it costs no more than if you paid the ticket within the 15 days it talks about on the back of the ticket.
For reasons of my own I happen to have Attack your Ticket; a practical guide to Canadian parking infractions, by McDonnell and Worsoff, Hushion Publishing, Toronto, 1992 at hand. They spend two pages on "drive-aways" and say that IF it gets to trial, without pleading either way, you should enter a pre-plea motion to quash the ticket on the grounds that it was not properly served (affixed to the vehicle or handed to the driver, the only methods provided for in the HTA). The officer must sign her copy saying the notice of infraction was so served, and if they have not, the JP should grant your motion.
Presumably the record at the Tags Office would show the signature—or lack of one—and they would pull the ticket before it got to trial. But someone still would have to go down to the office, as you must do if you intend to go to trial.
The Notice may never arrive, but if it does, in the words of the old joke, "Harry, just pay the two bits."
Ooops: the book was published 2002, not 1992