Ranma and Usagi, Bad End: Honneymoon edition.

Here's another in the "bad end" series. Such as can be seen here:.The Return: Ranma and Usagi, Bad End

In this case Ranma and Usagi are sent on a little vacation that, unbeknownst to them turns into a "Honeymoon".  Where first Ranma attempts to turn Usagi into a succubus... with an unusual result.  Then the new Demon Moon proceeds to "upgrade" her mate.

Is this what'll happen in the story?  Well...  maybe Ranma's the one that's corrupted first, and procedes to "upgrade" her queen.

Done by Saturnthirteen
If you're curious you can find commission info on his page.  Though mind, it can be NSFW

Update:  here's a sequel image Ranma and Usagi, Bad End: Anniversary edition