Wait... you can have sex with the Nameless? How?
And thank you all for replying. I guess I'll just stick with the serving option now. It's how he said I have no concerns for the others give me the guilt.
If you serve him, you can have sex with him during the latest part of the Orc's War story, which is unlocked after you have finished the lizard stories and gained the trust of the orcs. The length of the sex event depends on your relationships with the enemies (I had loving with werewolfs, ratkins, bandits, northcrest soldiers, lizard warriors and red orcs).