Oh yes!! This is absolutely hot!! And I can so see Cam double-guessing why he had been invited and Daniel finding all the rights words to make him see this invitation in another light.
And I bet it was him who persuaded Jack to give this "demonstration" to Cam so that he doesn't feel like the only one bottoming.
(And you have to love Jack's stamina! *bg*)

Very, very nice and a wonderful sequel to the first story!