Jeff sat there, pondering what just happened.
“My own mother just shat in my mouth, and I loved it,” he thought to himself. Deep down, part of Jeff’s mind was still fighting the transformation, but the voice that told him that this was wrong was getting quieter. That voice would soon disappear, as his sister entered the bathroom. Jeff’s sister was an attractive woman, with naturally large breasts and a tight ass. She had the makings of an actress, but her body didn’t matter to Jeff anymore. He could only see two things, the desperation in her eyes, and her ass, praying she would use him. His wish was about to come true, as she threw her pants and panties off and slammed her ass down onto Jeff. There was no waiting, as her ass immediately let out a large log into Jeff’s mouth. Jeff could taste the difference between his sisters and mothers shit. His mothers was more earthy, and softer, whereas his sister let out a firm, almost sweet log. Her ass was letting loose a stream of stiff, heavy turds into Jeff’s mouth. He was in heaven. The only thing he wanted was to taste and smell shit. His sister was still shitting with all these thoughts running through Jeff’s head. Eventually, to Jeff’s disappointment, his sister had finished. When she got up and looked in the bowl, she saw the magnitude of the shit she had taken. Jeff’s mouth was full of her shit. She shat past the water, with it filling every crevice in his throat, and halfway up the bowl. The amount was nearly inhuman.
“God, there’s so much,” his sister said. “You’re loving it, aren’t you, Jeff?”
Panic rushed through his head. She knew it was him? But how? Jeff remembered how he left the chronivac lying around and his sister must have seen it.
“You’re not the first person to use that thing. I gotta say though, it’s nice knowing you’re there, taking my shit and enjoying yourself. I never could find a guy with the same fetish as me, so to know you’re loving this is comforting.”
Jeff was confused. She enjoyed this? Jeff has the chronivac to blame for how much he craved shit, but his beautiful sister enjoyed scat without any outside influence. She had left the room, and Jeff sat there, with that magnificent taste in his mouth. She came back about a minute later, with the chronivac in hand.
“Shitting in a toilet takes a lot of the fun out of it, so I’m just gonna make a few tweaks.”
She messed around with it for a little bit, then emphasized her click of the enter key. Jeff immediately felt himself release from the ground. He was going back to his human form. His arms and legs grew back, and the bowl reshaped into his mouth. The only differences between him before his initial transformation and this one, is that he still has his sisters shit in his mouth, and he still loved every second of it.
“I was thinking, since you already proved yourself eating my shit, I might as well make the most out of it.” What was she talking about? Jeff was confused, and his sister went on to explain. “Every guy I’ve ever met was disgusted by my fetish, except for you. Thanks to this thing, you’ll enjoy every second of every shit I take I’m your mouth. You’re still in your human form, but the settings I tweaked still make you a toilet.”
“What do you mean?” Jeff attempted to say with his full mouth and shitty breath.
“Everyone will use you like I did, and everyone will think it’s normal. Furthermore, you’re going to enjoy it. The only thing you’ll ever want to eat or drink is going to be shit and piss. You’ll love the taste and smell, and you’ll be turned on by it. You’re going to be my human toilet.”