You better not be struggling yet. We're just getting started.
Once you've come down from that edge, I want you to start stroking again - this time very lightly, with two fingers and your thumb. Moving your hand slowly, gradually bring yourself to the edge.
I want you to stay as close as you can to orgasm until you think you can hold it no longer.
Once you've fallen far enough from the edge to stroke again, we'll continue.