is wincest...

Now that they were independent from reality, what was left to stop them?

Josh snapped her fingers, and felt a new outfit form around her heavenly form. Latex boots and gloves covered her limbs, and a corset and panties combo enveloped her core. She left plenty of space for her member and left tons of skin showing.

"Not bad sis!" Erica exclaimed. "What did you just do, before your outfit ?"

"I split us from the rest of the universe, we aren't bound by any laws anymore!" Josh answered, "So how about some fur, sis?"

Ericas eyes went wide. She didn't even need to answer as Josh snapped again. She felt her body change. Black fur spread from head to toe, her feet formed paws and her ears and nose became more feline. A tail burst from her spine and four extra breasts appeared under her first set.

Now in full cat mode Erica purred with delight. Her pussy-cat pussy grew slick as she entered heat. Josh could sense her need, and as a good sister would, approached her to help.

"Meow, Sis! That feels purrfect! Now give me some of your tasty looking cock! I soo need it!" Erica growled. Josh just dropped her panties and pulled out her stiffening cock. Erica crouched down and offered her pussy up. Josh pounced and entered her sisters cunt. Erica moaned in delight, and started thrusting into her sisters thrusts. The cat quickly built up to her climax, as did her shemale sibling. Josh could feel her balls churning cum and pressure built up in the base of her rod. Both quicken their pace and soon they came in unison. Rope after rope burst from Josh's dick and filled up Erica's aching cunt. Both collapsed under the pleasure coercing through their bodies.

"Thanks sis!" Erica said before falling into a light sleep. Josh got up, and wonderd what she should do next...