In a very deliberate way, Mina slowly leaned over to the musky cock. After eyeing it, she began to put her nose on it, letting Marina feel her breath on her shaft. Mina then began to shift as she put her tongue on Marina’s cock, as her nose and ears ballooned out as she licked down the length of the skunk’s musky shaft. Fur covered her face and spread to her neck as she savored Marina’s taste. The girl in front of her was turning into a mouse anthro, which should have alarmed Marina had she actually seen any of this. But the overweight herm skunk was busy in her own lust, enjoying the light cleaning her cock was getting. This changed as she felt a pussy stretch itself around her cock, forcing her to look down and see what was happening. What Marina saw was a tiny mouse girl lowering herself on this massive cock, squealing in the process as she was likely getting destroyed by the sheer size of it. Marina decided to stop her before she actually wounded herself and found some lotion in a drawer nearby and rubbed her cock down. Now taking a more dominant role, Marina shoved Mina onto the ground and slowly shoved it into the tiny mouse’s ass, her having to use her tail as a bit as each inch slid inside her and tore her insides apart. Not too much later, Marina found out that Mina wasn’t a normal mouse anthro, because after pushing her cock far enough into her, she watched her abdomen stretch to fit around her cock, becoming a literal cock sleeve. Marina put her massive hands on Mina and rubbed her against her cock. Once Marina reached orgasm, she pent her head back and thrust her massive hips forward as she began to fill her cock sleeve of a guest full of funky cum. After pumping her seed in her ass, Marina peeled Mina off of her cock and payed her down, the small mouse looking like a water balloon with massive ears and a mouse tail. Satisfied, both Marina and Mina fell asleep on the floor. When Mina woke up, she walked outside to grab a machine that she stashed nearby, hopefully issuing her experience to record some data on her new test subject. With some effort, Marina was strapped up and ready to be mount by another machine onto an exam table. When Marina woke up, the machine came to life and yanked her from the floor to the table. Disoriented, Marina had to swallow a few times to keep from hurling. After blinking hard a few times she looked around the room to see her bloated cum balloon of a guest barely dodging the equipment on a table in front of her and the buttons on machines behind her. She didn’t look like the shy but weird little girl that came in, she looked more like a mad scientist bent on revenge. Marina opened her mouth to talk but was immediately shut up by the mouse. “Shut it you, I wanted your cum in my pussy, not my ass! I hope the fluid isn’t contaminated, I hope I can still use it...” she trailed off lost in thought. Marina just closed her mouth and let her pace and ramble. How was she supposed to know her body could stretch, she just didn’t want to tear her in half by shoving a massive shaft in her pussy and forcing it deeper inside her. Mina came back around so that Marina could see her and said, “I’m going to punish you for ruining the experiment, something worthy of a contaminant like you...”