Amy

Yes, the bottom is sleeping with others and the top knows this. Minyeong brings it up saying how he only bottoms for Cheol, but tops for others

Because is disrectfull, you need to take the setting into account, he has no feelings for the pink haired, but he is still his concubine, what would the other countries say if his own concubine is fucking around behind his back? That would mean he can't even supervise his own harem, much less the kingdom

i think it’s because the pink dude’s action is considered disrespectful as he is the concubine of the Padishah.not because of jealousy but for dominance

So the thing is , since I think you didn't watch anything historical with harem , normaly NO . MAN . IS . ALLOWED . in the harem of the sultan , but since this is a bl only few are allowed I guess which are Tei , the bride and this pink bitch since he serves as a bottom or wtv the fuck, and the concubine ARE. NOT. ALLOWED. to sleep with any one other than the sultan so..... That was pretty illegal and hehehe

Bcz that's disrespectful to the ruler aka Padisha. Here Shuraka isn't bothered that pink haired bitch slept with other man. He doesn't care who that bitch sleeps with, but as he is the Padisha he can't allow such things. Cuz if words get out that the Padisha's concubine is sleeping with other man that would only make people think that the Padisha isn't capable enough to control his harem. So ofc Shuraka needs to take of this matter.

The pink one is being disrespectful because concubines can’t just do whatever they want, they aren’t supposed to be with other men or challenge his authority. Even if he doesn’t care about him, it hurts his ego, his control, and the palace order. He has to be harsh because reputation and authority matter...if others found out, he’d look weak.

Mysoginist

Then what’s the thing with smoking? Isn’t that to control your desire or something?

Well yes. That thing is used to suppress sexual desires. It was already explained in one of the previous chapter that someone with the 'Eye of Natam' they tend to have more physical desire than other people. Much like how in omegaverse Alphas have strong sexual desire. So that smoking thing is kinda similar to suppressant pills used by Alpha and Omegas. If you have ever read any omegaverse you will understand this. So here as Shuraka has the eye of natam, he's smoking that thing so that he doesn't get turned on by anyone else other his beloved, Tei. It's not his fault that his body is like, alright? He was born that way. Anyway, him smoking that thing while being in that concubine's room only shows how loyal he is to Tei.