Brenda was about to leave the house after putting the Chronivac on her IPad and had renamed her mom Katty when her sister came home. She scanned her and set that she will be transformed into a horny cat girl when Brenda enters the room she is in. She put up a barrier to keep people out and sounds from the house in and then met her sister.
"Hey Brenda where- AH!" Jess cried out as she fell on the floor and began to change. Cat ears appeared on the top of her head as her normal ones disappeared and a tail grew out of her tail bone. Her breasts grew from b-cup to d-cup as her clothes disappeared and a collar appeared on her neck as her eyes became slited. She looked up to see her sister naked.
She was about to ask what was going on when a heat struck her. "AH! So hot!" She moaned as she fell on her knees. She started to finger herself but it didn't work. Brenda stepped up to her and placed her cock in front of Jess's face. Jess started sucking Brenda's cock as she continued to finger herself. Brenda came a few minutes later and pulled out getting some cum on Jess's face. She walked behind her sister and pushed her down and lined up her cock before thrusting into her sister's virgin pussy. "NYA!" Jess cried out as Brenda thrusts into her. Brenda grabbed her slave's tail and used it as a handle as she went deeper into her. She was soon violating Jess's womb as she had a fucked stupid face. She give one last thrust into her and cummed filling up her womb. Brenda was glad she made her sister unable to be impregnated.
She pulled out and carried her sister and put her beside Katty. And used the Chronivac to make them appear human to all but her and her slaves and removed the horniness on Jess and made her submissive to her. She dressed in a bra and panties and joined them in sleep.