Due to the fact the virus she was infected with was a mutated strain that wasn't finish mutating when she was infected, and her DNA had a quirk in it before the infection, that quirk in DNA was harmless changed things. The two combined and had made a super virus with a 100% infection rate and causes the cat girl to feel the need to mate. The change rate for it was all males to females with a 50%/50% chance to keep their dick. Females were changed just into normal cat girls. If any cat boy went near her he will dead in a hour by the virus. Any cat girl will found themselves in heat.
She smelled her mom May and went looking or her. The cat girl found her mom in her room with her back to her. she moved up close and then jumped on her knocking her out. She tied her up with the clothes torn off and her mouth covered to. May woke up to find her new daughter looking at her like prey. The cat girl walked up and lined her cock with her mom's pussy. She trust in hard causing may to yep. she then started pounding her mom's pussy hard. she trust hard and fast. so the rag fell off her mom's mouth and she was moaning in pleasure. While this was happening she started to change. "Yes! Yes! use me! fuck me!" Jason now Jess said to her mother, her mind now changed by the virus. "I'm going to breed you. you'll give birth to litters of my kittens." "Yes! Yes!" May's mind was now changing as well. "Breed me! Use me as a breeding machine!" she meowed in pleasure. Jess's cock was hitting May's womb when it went in. The feeling of her mother's womb around her cock was to much and she cummed in her impregnating her. "YES!" May yelled.
May was knocked out. Jess grabbed her and took her to the woods. She found a cave 4 miles away from town in the nearby mountains. She found two cabins and took the bedding to the cave and put May on it. Now what?