What if the hunky male teacher isn't interested, either because he has someone else in mind, or is already with somebody else secretly; either male of female? What if the only way for the hunky gay teacher to keep his secret is to pretend not to notice, go out for a coffee in the lobby, or let the staff distract him in some other way? Would he do all this to let the boys have their fun, F that lust right out of her and take some pictures and video of the deed, as boys will almost certainly do in this day and age? I could even see a big and dark love bite/hickey being left right on her neck by one of the clever ones as he was mounted up and rutting into her, and both realization and future opportunity later on when he notices the band aid on her neck on the flight home.
As another angle, the young blonde teacher may look quite enticing all stretched out and helpless, but is her personality ordinarily toxic, as in do either the boys, or even the hot hunky teacher, wish to punish her for something, play a little catch for something we don't know yet as readers? I'm assuming that these characters are from a wealthy school district, or wealthy families in that district so as to be able to pay for such a trip, so with that in mind I'm assuming this isn't the football team, but possibly the band kids. Nothing wrong with either group obviously, but different kids with different motivations to be sure.
At the very end of the scene does it get revealed that this was just a waking daydream for the hot hunky teacher, or even the blonde, or even the testosterone laden teenagers as something that they'd just love to do?
I toured an old German town's dungeon once a very long time ago, and wow the thoughts going around in my kiny mind; as in it would be fun to try some of that stuff with the right person. But, back in the real world I also got the underlying thought that these people really got off on inflicting this on others, like they put real labor hours into designing and building things to intentionally inflict pain and suffering. Leaving the playful-fun kink aspect behind for a moment, not some of humanities finer moments to be sure.
Hope I didn't end that on too dark of a thought, best wishes, Jackie.