Well, the central idea of a joystick-controlled slave is rather original. But I had problems to follow at the beginning, thinking that the smaller end cap and the plug would be two different items. This impression was strengthen by the use of first one expression frequently, then only the other (word repeat!):

"I continued to clean the seat as I felt Master lifting my skirt a bit more and I prepared myself for the screwing in of the plug. Carefully Master grabbed the end of the plug and held it steady as he screwed the wooden dowel into the plug."


Previous:

That the Master used a second end cap for his slave's arse is quite clear - she's gagged with the first one. But nevertheless it sounds better that way:

"I felt self-conscious, as I knew he was looking at my red ass sticking in the air with [the]a second end cap, plugging my ass hole."

I saw some spelling mistakes, but I have enough in my own texts...

All in all, your story was absolutely worth reading!