Completely understand that though the rape scene is period appropriate(in sense of lack of consent, not morals), it was dumb as f*ck. Idk why the author didn't just let him absorb the yin energy through his hand over her uterus. On top of him saying he wanted monogamy like why destroy that? However, it's not a harem he only has the 2. Plus, the only relationship related content in the story is all centered around moon gu or ku cant remember. That even doesn't appear till the very end and is super short, less than half a chapter. So, I would strongly recommend holding out if you can put that dumbass rape scene behind you. Personally, I shall forever have the headcanon he only ever had moon gu/ku with him receiving the yin energy through touch.
Also, if you were referencing the harem cause of the golden fox in Descent of the Demon god(sequal), she is never presued sexually and is more of a nanny aunt to him and the 2 wives. Again, I strongly recommend you hold out as the only thing remaining in this story is ruthless bloodshed and scheming.
Dropping the manhwa after reading the rape scene and finding out he’s gonna have a harem which WHAT lead to his moms demised. Was good read though gg go next