For about two months, the litter grew in Eve's womb, and one fateful day, her water broke and she lay for hours birthing the first four 'femans'- the interspecies offspring of her and the virile feline she had allowed to breed her. Once they were all birthed, she lay on her side, resting so that the 'femans' could reach her chest and suckle from her breasts. But after this, Eve became a loving mother to the four 'femans'- two males, who she named Cay and Ay, and two females, which she named Nn and Bel.
At first glance the 'femans' were much more human than feline, besides their facial and back leg structures and long tails. But as they grew- and they grew up fast, far more so than their modern day descendants- they grew thick fur, in differing colours, and the males developed penile spines. They inherited some of their mother's intelligence, and were able to walk both on two and four legs, but it was clear they were not solely heirs to the evolutionary cul-de-sac that was the human.
Since 'femans' were in their earliest beginnings, they had no concept of family, so they soon became curious about the mating rituals of other species in the Garden of Eden. Cay and Nn witnessed two apes mating, recognized that their bodies had similar parts, and soon they were kissing and Cay had started to fuck Nn's passage, eventually filling her with his seed and impregnating her.
When they returned nonchalantly to their siblings and mother, all of them smelled the scent of mating on them, and it would have dramatic results...