First, Sally and Jason found their tailbones stretching out, leaving a rough gray skin as the appendage grew. They soon had two long, ropey tails of similar length, with black hairs at the end.
"Wow Sally, you've got a tail!", said Jason, trying to take his own attention away from his daughter's lewdness. But that only earned him a guilty sight of Sally's young buttocks. Sally was blushing too as she saw her father's butt, now with a wrinkly gray long tail wavering over it.
As they marveled at their new parts, their feet came next. Their toes started swelling, with toenails growing thicker and rougher, now even a little yellow, the base rounding up to become more like Elephant feet. Their ankles widening and roughening as the very bone thickened.
"We're...elephants?" Sally questioned, as she looked down at her changing self. She and her dad were standing up on their new thickened grey feet. The gray wrinkly skin crept up their thighs, as their butt cheeks swelled to larger size, and in between those cheeks, their anuses puffed up into beastly, fleshy black donuts. That made both father and daughter go even more red.
"Well yes… we’re going to be Elephants", Jason remarked. "We’re growing Daddy!" Sure enough, they both found their bodies gaining height as if it was nothing, their bodies bulking out as they swelled. Sally laughed. "I will have a trunk!"
As soon as she said it, their noses began tickling, and a stretching followed, Sally encouraged it, grabbing the tip of her nose and stretched it out herself. “Sally! Don’t do that you might hurt yourself” Jason said trying to prevent it, but as he approached Sally laughted and also grabbed her dad’s nose and pulled it out. “Whoa… that didn’t… hurt at all” Said Jason surprised, “And I think I can move it! Daddy I can move it!” “Yeah… me too”.
While they were busy looking at their new trunks, their ears also grew in size and began turning grey and wrinkly. They looked at themselves in the mirror, they were mostly human but bigger, bulkier, and with an elephant lower body, trunks and ears. However, they still looked quite human, with their torsos and arms still with their soft human skin. Their genitals also remained human-like.
But that was about to change.