Lisa gradually woke to the sensation of something poking her. In a half-asleep state, she wasn't immediately sure what it was. The room must have been pitch dark, as she couldn't see. She tried to ask Ty what was going on, but found that she could not speak or move. She couldn't feel her arms or legs. In fact, she couldn't feel anything except her torso, and an increasingly insistent poking. Ax she became more alert, she realized what had happened. She had transformed into her mattress topper form in her sleep. Her body now was just one big furry rectangle.
Ty must be trying to get her attention. Was it morning already? She manifested her face, as she had done before, and realized that her whole face was pressed up against something. Oh, she thought. I'm lying on Ty, face down, and he is still in his mattress topper form. And that poking? She wasn't sure whether he was awake, but realized what he wanted. She shrank her face away, and grew a pussy, where the poking sensation had been. As he penetrated her, she felt her own pleasure, and his, on top of the pleasure that any pressure on her surface gave. Ty's cock started thrusting, and she started contracting and relaxing around him.
She was unsurprised to feel another poke, in a different location, then a few more. As she added pussies to accommodate them, the pleasure grew tremendously, until they both suddenly came.
A few minutes later, she felt his cocks start to withdraw, and shrink away, until she felt that she was once again lying on a furry, but otherwise flat, surface. She thought about making her pussies disappear, but decided that she liked the feeling they gave her, all pressed up against Ty's warm furry form.