You look at your girlfriend. She blushes and starts to talk "You...you know, I have a special fantasy. I want to become a doll." "A doll?" you ask. "Yes, a lovedoll. A fucktoy. Or whatever you call it." Your girlfirnd blushes even more. "I've seen so many stories about this. Most of the women are lost in pleasure after they have been transformed into a doll. And here is my chance to try it by myself."
"OK, it seems you already decided it. Has the victim any special last wishes?" you reply.
"Yes!" she says smiling and a little bit relieved. "I'm so happy that you understand me. I want a slow transformation. Lets say, from now on in 8h I will completely turned into plastic. And I want to be used. Thats your task." she smirks.
"OK, I will do my best." Nevertheless, you are not sure about this. You trade a girlfriend for a mindless fuckdoll. That seems so completely wrong.
You spot the small display at the wall. "Transformation in progress" and a countdown was written there. It had begun.