*coughs* Yes, well, for a porny little snippet I couldn't put in the ethical angst that I'd feel necessary for true student/teacher fic, so roleplaying (which I like very much anyhow) was my out. However I did very carefully make it completely ambiguous until the end so that it could be read that way... *veg*
Oliver is burly! Of course he is heavy! *giggles* And the repeated "sir" was most deliberate, but I'd forgotten your lap-sitting kink (at least consciously), so that was just a bit of luck. Hee. Glad you enjoyed it!