Followup to Art Class Stiffy

So I recently posted about getting an erection when I fell asleep while nude modeling at an art open studio. I got turned on by the idea of the artists drawing it and I've used that for masturbation material ever since it happened.

Well today I got an email from two of the artists (a married couple) telling me how much they enjoyed the session and my unexpected hard-on. They said it was a treat for them because they've always wanted to draw a man with an erection but it's never happened in any class or open studio they've attended. He's modeled for her but he's never really had the chance to draw a model with a hard cock. They then asked if I'd be interested in modeling with an erection for them at their house.

I haven't answered them yet. I really don't know them as this was the first time they attended the workshop. Also none of the workshop regulars know them either. I have to admit I'm loving the idea though. I wonder if they'll mind me occasionally masturbating to keep it up? Is it just for erotic art or are they thinking about sex? And what happens if I edge a little too long and end up blowing a load?

More later