'Sister' from hell

"Wait, couldn't you just change your voice?" Jim said to 'Jenny' as she was licking his shaft.

Just then she pulled away. "Luckily for you, I have programmed the device to change my voice after my tongue made contact with your cock!" it came from her in Jenny's female voice all of sudden, followed by "And now, shut up, I need to get back to work! Damn, I love those cheesy porn setups!".

Immediately she positioned herself on the sofa and began to shove it in.

Just as it was touching her throat though, a loud phhhhhhrt could be heard in the room.
"Jenny, did you just fart!?" Jim brought out in disbelief.

Now 'Jenny' moved back so she could speak a little.

"I am no' Jenny! An' w'men a'e no uni'orns! An' now..." he heard her gagged speech escaping her filled oral cavity.

Now, Jim was shocked and excited at the same time. This creature claiming to be his sister was obviously not very good at impersonating her and it was just a matter of time to the next obscenity. On the other hand, that is what made this whole situation bizarrely appealing!

And all that so he could fuck with Mia. With Mia the plastic doll who wouldn't even feel a thing!
Hmm, maybe I should turn 'Jenny' into a plastic doll as well? Could be fun and I could easily dispose of Dad that way! Jim pondered.