"I feel like playing a bit of cat and mouse", Mary said, "but we currently lack a mouse to play with...I know! I'll call someone who we can use as a mouse!" First, Mary walked over to the box of potions and mixed mouse and rubber potions, a bit more mouse than rubber to make him a little bit smaller than them. She then called one of her friends to come over to help her with something. The potion was ready, a person was found and after both tigergirls waited a while for the man to come over, giddily rolling around and wrestling a bit in the meantime, the doorbell finally rang.
Mary got the potion and opened the door, and the man produced nothing but a short "hi, you asked--" before he saw the tigergirl standing before him and failed to say anything else as he stood there in shock. Mary quickly dragged him inside and sat him down on the couch. "Glad you could come", she said with a smile, "I don't think many people would have done this for me." She stared at the other tigergirl and said:"I don't think you've met my twin? I'd like you to meet...um...Michelle." "Michelle" extended her arm towards him and gave him a friendly pawshake. "Pleased to meet you." Mary continued:"Now, we'll get to the reason we called you..." Mary pulled the stopper off the mixture, pinched his nose shut and gushed it down his throat. Spontaneously, his skin began to turn into white rubber of a completely smooth texture, snow white as a winter morning from top to toe. "W-what are you doing...what is this...", the man finally stammered as he began to notice his predicament. "Don't worry, it'll be done in a minute and you won't feel a thing, I promise", Mary reassured him. His eyes now began to fill with a shiny red latex, turning his brown eyes into ruby red spheres that turned his vision to black and white. Huge rubber dishes emerged from his head, pink on the inside and white on the outside, forming a pair of mouse ears. The same pink color appeared on top his new muzzle as a tiny button nose, a muzzle that hid two giant plastic buck teeth that he could see as soon as he opened his mouth. The rubber at the ends of his fingers and toes quickly blackened and stretched into small points, adorning his mouse hands with sharp claws. "Now, let's get you out of those clothes before the next change messes them up", Mary said and quickly took off his clothes. There he stood, the almost-mouse man, naked though his genitals were surprisingly hidden. A few more structural changes occurred, making him more prone to standing on all fours and as slinky as a real mouse, before the final change happened. Rubber near his butt turned bright pink and stretched itself outwards into a large point. A huge pink rubber mouse tail was now snaking its way onto the floor until it stopped at a length about equal to his body.
Four feline eyes greedily stared at him and he knew he had to flee, and just in time as he darted away just before the two of them pounced towards him. Little did he know he had nowhere to flee...