Teacher's lounge

You look at one camera and realize there's someone going into the teacher's lounge. This is unusual at this time of day, usually no one goes in there for hours. You recognize the teacher as Mr Woods, the math teacher you've heard your girlfriend complaing about... apparently, despite being young and good looking, he's also a real hardass.

Then, you get a surprise. He brings a girl in with him, and, to your shock, it's YOUR GIRLFRIEND! You try to tell yourself that it's just a student-teacher meeting, but right then he unzips his fly and pulls out his dick. Mary goes down on her knees, and grasps his rigid rod with one hand, and his balls with the other, before sucking on his cockhead. Apparently, she wants some extra credit.