A little of both, he is trained alsoI'm m watching for signs and stop before. It is hard for most to understand, but I am actually edgeing him in this scene
I understand you are edging him. In similar situation I was once left black and blue for weeks but when I was finally brought to orgasm my whole body exploded.
this is the principle, the mistress knows the limits of her slave (even if the goal is to reach them and sometimes to exceed them a little) in fact it is he who sets the limits