Savage Alien (A Sci Fi Alien Abduction Romance) (Vithohn Warriors) by Stella Sky

This is one strange story. The Vithohn conquered earth and they took over the planet after destroying all the earthlings, but there are pockets of humans living all over the planet out of the sight of the Vithohn. One woman discovers that having sex with a Vithohn removes his aggressive tendencies and he becomes reasonable. This idea is far out there, but it is how they get Tesssoul to agree to help them. It had possibilities, but the description of the Vithohn has them having a tentacle, but I not sure where it is attached to them. The story meanders much in the weeks of sex, before Sidney brings him back to the human camp. From there the story really goes south.