PFFT
There is no "end to a vacation" (poorly paraphrased -- sorry!
). If your wife wants to visit the big smoke, we are about 45mins on the west side. The missus will take ANY reason to go into Toronto -- literally any -- and I'd be happy to meet up. You have my mail -- send me a heads up if that is in the cards for you!
Otherwise -- safe and awesome trip to MTL!
Edit: I should also point out, that, apparently the sweet "free air" has affected her. She had trouble breathing in Moscow -- at all. It was 32*C and she was gasping. Here, she said, even at 32*C she can still breathe. It's not terrible (to me, it's like breathing in water), but she could handle it. She had trouble breathing there, until she returned to Canada. Climate change is a Chinese hoax, for sure!