She get some good use

Mary couldn't move her body as she was fucked in her open mouth by the guy. Then she heard some other male voices and a moment later she realized that some more men had entered the room, chatting with each other and the guy who was fucking her face.

"Hey, you have a cute doll there," one of them said. "Mind if we join?"

"Not at all," the guy said. "I am testing here a good bit and if she satisfies, I take her home later."

"Great idea," the guy said. "And of course no worry, you have first dips on her."

Mary tried to complain about them talking about her like an object but another orgasm pushed that thought fully away as she could feel a cock been shoved into her plastic pussy, which was tighter than ever before.

"Wow," the man, who now started to slowly fuck the Mary doll's pussy, said. "She turned out perfectly."

They kept fucking mary a bit more as time progressed. She had countless orgasms, most of her thoughts circling it at this point. Suddenly she could hear a familiar voice.

"What the heck ...," Hannah said as she walked into the room with the naked guys fucking the life-sized sex doll. She was looking for her sister Mary and it took her a second look to realize things. "Mary? What the ...? What did you do to my sister?"

"Angry isn't looking good on you," one of the men said. "Better replace it with pleasure." Before Hannah could say something, he had flipped on the TV again and porn started to roll on the screen. She couldn't move her eyes as the scene started and she felt immediately aroused, her hand moving to her pants. It was a follow-up of the scene Mary had watched, this time with the man fucking two twin dolls, which seemed super realistic.

"Mmmm ...," Hannah mumbled as she started to finger herself. The two guys who were fucking Mary continued and the third came over to Hannah, stripping the young blonde out of her clothes. Her pussy was wet and so he pulled her over to the couch, sitting down and pulling her over him, making her ride slowly on his cock.

Hannah felt the cock slip into her pussy and she started to ride, his hands on her hips. She couldn't move her eyes off the porn and only in very brief moments, she could look at her sister, who was fucked with a frozen, plastic expression on her face.

Before too long Hannah started to change too, with some sort of plastic spreading over her skin, changing her body. Her hair first became plastic too, then slowly getting tighter and tighter against her head. Finally, she started to slowly shrink.

"Hey, I know what she turning in," one of the guys said. The man fucking Hannah grinned and made her keep riding. More and more the girl shrunk, her arms and legs retracting into her body. Finally, she had only the size of his cock, even a bit smaller, so his cock, who was still going in and out of her real-sized pussy, came out of her mouth again. Finally, he pulled the fleshlight a bit up and came, some cum even shooting from Hannah's mouth as she had a huge, mind-breaking orgasm.

"Nice toy," one of the guys remarked. "Fun that the sisters took a different take on the becoming a doll thing."