The Great Change: Pervy with a hint of monstergirl

He had already changed a lot, no point in going overboard just yet. It was one thing to give his beloved sister cute ears and a tail, it was quite another thing to go any further than that.

Erica groaned, her rough tongue and soft lips providing a wonderful contrast against his mammoth member but there was enough time for that kind of play later. He gently grabbed her shoulders pulling her upwards, grinning to himself as he placed her against the table. Her long ginger tail twisted and writhed, enticing him towards her sweet and juicy pussy.

He could hear Melanie shocked gasps as he tore the remaining clothes from his sister's bottom eagerly grasping her beautiful bubble butt before guiding himself into her drooling crevice.

John let out a hiss enjoying the sensations around his member as he lost his virginity in a very unique way. He groaned, grateful that he increased his own stamina and seed production. Erica let out a howl of pleasure her tiny fangs visible as she opened her mouth drinking in the sensation of her brother pushing his way deeper inside.

"That's it John, that's what I need, fuck your kitty sister," she encouraged him her scarlet ears twitching atop her head as she let out all the pleasure he was packing into her back.

John grasped her hips sliding deeper and deeper until he came to resistance. He hadn't expected this. His beloved sister was still a virgin, well, not any more.

John slammed all the way, his balls slapping against her sex as he began to happily use the needy cat girl.

It started slow, but quickly built up an obscene squelching rhythm all the while Melanie watched with a combination of surprise horror and arousal unable to intervene.

Erica's massive breasts bounced heartily on the table hisses and mews becoming obscene as they built towards John's first climax.

He could feel it building, his perfect sperm getting ready to turn his sister into the mother of his children.

With a grunt John slammed himself as deep as he could pulling her tail just as he pressed as deep as he could into his fabulous feline femme fatale.

The geyser of sperm that filled her sisters womb was something John could be proud of.

When he finally finished he pulled out of his sweat -soaked sister and glanced over to where Melanie sat with a combination of fascination and horror.

What to do after a show like that?