i hope it gets sorted out, and she dosent twist it arround to sound better for herself.i cant see that big of a deal in making a fake smoke, my kids pretend to smoke as theyve seen my mum smoke every time they see her, i dont like it, i just take it off them and tell them its yuck and all that, making a big deal out of it isnt the best way to get them to stop doing it, most the time it indirectly encourages it.
i hope that after today she has more respect for you and your son. id also be getting her to make it up to your son so he dosent feel traumatised by it and decide to hate the class.