Well, for sure I would give you a creative process out of this fabulous panel. There were hard work on this specific panel, the result is exactly how I pictured it in my mind.
You can see how some parts were redrawn, from the sketch. The shading is precise & darker, deeper as the sex scene itself. No kidding, I actually realized the shading on all the latest pages are darker than the first ones, like the start of the sex scene. As the graphite tools are stricly the same, I guess I put so much pressure on them, ha!