Henry's dick started leaking precum as the rips on his trunks grew larger. even though this was making him very aroused he didn't want to fuck his sister, without her approval at least. " hey Hannah um, I need to ask you something. I'm feeling pent up and I wondered if you could, you know relieve me." nervously scratched his head behind his horns while his right hand was failing to hold his swim trunks together. Hannah gave it a thought and said " you know i'll do whatever to help you." Henry was moved by this, then his trunks ripped in 2. this released his 4-and-a-half-foot dick to it's proper 75-degree angle. his sack dropped back down into its proper place between his knees.
his sister undressed and lay on the ground and lifted her ass showing her it to Henry. he then rammed his gigantic shaft into her butt and proceeded to hump her. as he did Hannah's pussy pushed out and closed up becoming a wrinkly and forming into a proper Scrotum. her ovaries descended and transformed into testicles. once her balls were in their sack her changes rapidly progressed. Henry had waited from the moment he started explaining what happened to him, this, of course, made him pent-up with pressure and now he was repeatedly cuming into his sister's ass. her clitoris thickened in both width and length before becoming a 10-inch rod with balls to match. hair spread over her balls as her bush became wild.
her hips re-positioned as her ass's fat dissolved away leaving 2 hard buttocks of pure muscle, compressing around her brother's dick. her thighs grew firm and hairy, and then her knees grew to match. her calves grew as well till they too became hairy. Hannah cumed then but due to her brother repeatedly cuming into her she kept changing. her feet grew to a masculine 11.5 as she kept cuming along with her brother, the cum emptied into the nearby pool and hot tub filling them with cum and turning the waters into thick white musky goop. her waist went and widened gaining an impressive 6-pack, a treasure trail expanding from her bush. the cum now caused the pool and hot tub to flood as the filters were not meant to drain such thick liquid. her chest area grew, her breasts sank into her chest then her pectorals muscles grew as well, hair completely grew over them.
the cum now coated the entire pool area and started to fill it up, hitting the walls that kept the pool out of the public eye. the walls were an outstanding 7 feet tall. at this point, Hannah had straightened her back as she grew to be 6'2. her arms soon became masculine, first, her pits grew hair then her biceps doubled in size and got covered in hair. her elbows soon grew as the cum now shot out of her cock like a water feature, landing in the cum that was now up to half her calves and his ankles. neither noticed this as her hands grew thicker and rougher. the cum was now up to her knees and half of his calves, as her neck became thick. her adams apple became visible giving her a deep baritone voice. the cum was now up to her thighs, her balls now splashing in and out of the cum as she continued to hump and ejaculate cum from her cock head. her brother's knees now in the cum.
her head changed next, her skull shifting. her chin became square as her jaw became more pronounced. she soon gained a 5 o'clock shadow over her jaw. her nose becoming masculine and her eyebrows grew thicker. Finally, her hair bun came undone as it shifted to ear length. the cum now completely covered her dick as it was up to her waist, and to her brother's thighs and balls which now looked like a pair of beach balls in the ocean. while cuming she had an idea ' if my sister became my brother after changing into a man why can't I,' he thought. ' I've always had a liking for the name Harold so I'll now be named Harold.' Harold thought now a 25 year old man. the cum was now up to his chest and growing up to her neck and his brother's pelvis. the cum raised up to his chin and Henry's lowest abbs with no signs of slowing.