You put up with a LOT from your eccentric step-sister. Ever since step-Mom asked you to take her in, you've been nothing but indulgent of her quirky habits and feline identity. You come home to her crawling around on all fours, frantically meowing and rubbing on everything in your living room. She claims she's in heat and apologizes for making you uncomfortable, but she continues her bizarre display of arousal until it becomes difficult for you to hold yourself together. Sis is struggling too and claims the scent of your pheromones has thrown her into a frenzy. She tries her hardest not to pounce on you, but she just can't seem to keep her paws to herself. Sis begins to yowl and begs to be bred. Though you know you shouldn't go any further, step-Mom has always told you to play along with her delusions and the only humane thing to do is to fill her with a big, healthy litter of kittens...MEEEEOW! (Originally a custom commission, but no personal names are used)