Oh man. Sam could just imagine that conversation - 'I knew about the demon blood and I know you fucked you're brother'... awkward! Bad thoughts. Really bad thoughts. Best not to go there.
Hey, Sam wasn't keen on the whole 'one finger, two finger, three finger, dick thing either. It seemed cliché and like something out of a badly written romance novel. Becky had probably written the one, two, three, dick thing plenty of times. But hey... big dick, tiny hole. Do the maths.
Still, Sam did gather the confidence to move onto two fingers without too much fuss. The shy, delicate touches soon went right out of the window.