Achieving genetic transfer through coupling was proving to be a success, too successful in fact. She had not anticipated the process would be so rapid and so... so... The feeling of his essence being shared with her, changing her, welcoming her into his species in the most intimate way imaginable. She knew she had to pull away now, she had planned for it, but her body refused. Always wanting that little bit more, just a little more...

Base drives were taking hold, the way her new tail curled against her mate; aching for stimulation. The air a thick fog of pheromonal lust. Her body becoming ever more welcoming and accommodating of his alien manhood. Becoming so very compatible, developing all the right internal bumps and shapes for his member to tease. It was all too much, too much to resist. She felt powerful, sexy, her human cloth falling from her increasingly bestial feminine physique was a release.

Her mind shouted pull away, while some of her humanity still remained. But her body howled more... Even as his seed erupted into her, her scientific mind in shock at what she had allowed, his genetic material now inescapably buried deep within, she couldn't help but grin... There was no sense in denying herself this indulgence now. Even if she were to pull away, his genetic material would stay with her until the last of her physical humanity had disappeared.

With a passionate feral moan, she allowed the last of her human inhibitions to quieten and embraced her new life partner. The women was gone, an animal now stood where she once did. Naked, raw and eager to learn of her new existence.