Chapter #7Brother-Sister genital swap by: Unknown "Hm... how about I give him my pussy?" Mary suggested.
"Ah, an excellent choice!" Kate said proudly, already preparing something just out of her children's view. It almost seemed like she was already wanting to do a full-on genital swap, whether that was what Mary went with or not. "Lay down, and spread your legs nice and wide." She instructed, pulling out a long tube.
"This is gonna be cool!" Mary grinned. "First I become a dickgirl, now I get to make my brother a cuntboy!"
"Why....?" Mike groaned, exasperated with the series of events unfolding.
Kate hummed enthusiastically to herself as she brought one end of the tube between Mary's legs. She attached the tube onto Mary's pussy with what looked like the head of a vacuum, which stuck to her vagina with a wet {plop/i}, Then, she pulled out another tube, which she attached to Mike's barren crotch.
"Now, here comes the fun part~!" Kate giggled. She fiddled with some knobs and buttons on the control panel of a machine the tubes led into, and with a proud, flourishing press of the activation button, the machine whirred to life.
The tube connected to Mary sucked on her pussy like a vacuum, making her moan out loud; her new dick stood up tall and proud, excited by the stimulation its new host was experiencing. Eventually, the vacuum sucked her pussy off completely, and with a few tweaks of some knobs and a throw of the switch, Mike started experiencing some particularly.... odd sensations.
Now it was his crotch that was being stimulated, despite having nothing to actually stimulate; clearly, the machine was now transplanting the sucked-up pussy onto his body.
The machine shut itself down, and both tubes came off the brother and sister with another wet plop, and they each looked down at themselves, getting a feel for their new condition; Mike now possessing a vagina, and Mary now lacking one.
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