Although Leshas were given the role of companions or concubines for the Sha, neither Amon nor Na-in ever had sex with any of them.
SPOILERRSS!!!!
Amon is actually a powerful dragon, not a god. A dragon's purpose is to find a mate. In that universe, dragons don't really experience emotions the way humans do. Their instincts revolve around fighting other dragons, protecting their territory, and eventually finding their destined mate.
You should read the author's other work, I Can See Your Stats (it's completed). It's set in the same universe and explains dragons and their instincts much better.
The only way dragons are able to truly experience emotions is by finding their mate. In Amon's case, that was Na-in. Amon never had feelings for any other human, he can only feel anything when he's with Na-in, and as far as the story goes, there's never been any record of either Amon or Na-in having sexual relationships with any of the Leshas.

Pls pls someone spoil me even in DM if you don't want to spoil others but tell me rue becoming a lesha is not going to end up with him having sex with any of the shahs i'm SO tired of this i was enjoying the direction lately damn