"I think I want you to be a part of me Jeff." Ema said with a smile as Jeff blushed, realizing immediately what Ema meant by that. "A body part of you?" He asked as Ema nodded.
"Not just any part." Ema said as she walked over to the Chronovac and started typing, working with what the program gave her before nodding. "You're going to become my tail." She said as Jeff blinked.
Seconds later their clothes disappeared as Ema turned around, giving Jeff a full view of her ass as he blushed before suddenly laying down on the floor and lifting his legs up together. Touching his feet to Ema's tail bone he was shocked from the sensation as his feet melted into Ema's tail bone, and connecting Jeff to her, her blood starting to replace his as Ema moaned from pleasure. His legs started to conjoin and shrink until it was only a few inches wide in diameter, his body slowly shrinking to match as Ema suddenly lifted him off the ground with new muscles as his legs finished conjoining. Suddenly Ema swung him around to face her before speaking.
"You aren't just going to be my tail Jeff, you're going to be my living, female, tail." She said with a smirk before kissing Jeff, electing an eep of shock from him as his dick started to shrink away. After a couple of seconds Ema released Jeff from the kiss, and by then his dick was gone, replaced by what was essentially Ema's second vagina, which started to travel down Jeff's connection to Ema until it was situated right where Ema and Jeff were conjoined. Suddenly Jeff's arms started to shrink into his body as his nipples started to expand. While his chest was much smaller thanks to him becoming Ema's tail, it was clear she had intended him to be at least partially her own person as her arms disagreed, leaving Jeff as a tail with breasts and a head attached to Ema's body as she swayed behind her lazily under Ema's control. "This works."