What teacher wouldn't be turned on by watching two of his students getting it on with each other?
When this tricky old teacher manages to get Martina to stay behind after class with her friend, it's not an academic lecture he has in mind, it's a bit of threesome action. He uses his experience and abuses his authority to get the two girls playing along with what he wants, and with each other. The two babes really enjoy playing with each other in front of the tricky old bastard, and when he gets his cock out and ready to play they're all fired up and ready for it to fuck them senseless. He's not just a tricky old teacher, this one's a lucky old teacher too!