There are 3 sides to every story. His side, her side, and the truth. I am still waiting to hear the truth.
Pardon me for my skepticism, but everybody has something to gain here if this "story" is accepted: he gets a divorce and the right to marry someone else (quite likely another Pakistani bride whom he will have to sponsor) and she gets the right to stay in Canada under humanitarian and compassionate grounds, even though she may not qualify for a PR on her own merits. Is anyone willing to take bets on whether somewhere down the line she doesn't decide she wants to sponsor a spouse into Canada too? What exactly is Canada getting out of this?
How does it become Canada's responsibility to provide for this so-called "abandoned bride", who (if you believe him) was told she shouldn't get on the plane because he had withdrawn his sponsorship? If you believe her, she was coming to a loving, excited husband. Since he turned out not to be such, how does she become Canada's problem? I'm pretty sure there are plenty of Canadian wives and children who have been abandoned by Canadian husbands, are you telling me every last one of them is relying on government assistance to make their way through life?
I know I might sound harsh. Or that I don't understand the cultural norms and what she will face as a divorced woman if she goes back to Pakistan. I can only say, that there are hundreds of thousands of women worldwide who are facing stigma of all kind, living lives made difficult by circumstances beyond their control. In most cases, they have to just deal with life as it comes, they don't expect someone else's country to clean up the mess and assume responsibility for them.