"Mmmm, that was amazing!"Jenny said. "Now that I have both my own body, and a part that is your cock, what will happen if you ejaculate me out again?"
"Are you already in a hurry to stop being my cock? I thought you might want to stay a while!"
"No hurry! I like this a lot! I'm just trying to imagine what comes next, " she said. "What _cums_ next," she reiterated, grinning
"Well, let's find out." Jeff set the Chronivac so that he would ejaculate her out again. "You'd better get me erect again."
"Get _us_ erect again," she corrected him. "Although I can see, and feel, that you're already getting there just thinking about it." She reached out and touched his cock, and shuddered as she felt that both as her hand, and as his cock. The cock was still absolutely enormous, so she couldn't even get her hand around it, but she guided it in, and started riding him.
Before long, Jeff felt that he was nearing climax. Jenny could feel that also, and they both moaned. Jenny enjoyed the sensation of both being ejaculated out of the cock, and also feeling the cum fill her up. As the cock erupted again and again, she felt more and more of herself pulled out of him. And into herself. He felt his cock shrink back to his normal size. She felt it too, but only from her pussy, as her other half was no longer his penis. They rolled over, and he pulled out.
"I'm... I'm inside myself!" she said. "What a strange sensation!"
He looked at her belly, which had swelled considerably due to the large amount of cum.
"Ooh, I can feel the swirling start!"
He could see motion going on in her belly.
"I'm changing! But it's weirder than previous times, since I'm doing it in a tight space, instead of out in the open."
As he watched, her belly grew. And grew. And grew! How big could it get? "Is that hurting you?" he asked.
"It's a little painful to this part of me," she said, waving an arm in front of her body, "but the part of me that is inside is in ecstacy!"
She moaned, as whatever changes were occurring continued for a while longer. Then she said, "That seems to be finished." Her belly was absolutely enormous. He noticed that her breasts had also grown quite a bit.
"In that condition, can you stand up? Or even sit up?" he asked, holding her hand.
"I'm not sure," she said. "Maybe if you help. I didn't realize this would stretch me so much. It feels quite nice, though."
Jeff helped her to sit up. He was amazed by her size, too. And turned on. She saw his cock go erect again, though back at its normal size. She pointed at it. "I feel so overwhelming full that I don't think I could take even just that, now," she told him.
"That's OK," he said. "I can wait."