Hmm

I think he already knows

He just gave him a hand job you can clearly see that he didn't fucked him.
And he clearly did that so the twink don't contact nanjoo

Huh? How did you assume it was just a handjob? Twink said he needs to go to sleep because it has been a while and that he is sore, he def would not be sore from a handjob, I mean he was beeing double penetrated before, handjob is way too vanilla for him to be sore. Mok washing his hands does not necessarilly mean it was only handjob, it seems more like he felt tainted after squeezing the twink dry so he does not run to Nanjo.

Doing it out of jealousy doesn’t mean nanjo wouldn’t be upset if he heard about it

Exactly

Then what else he can do at that moment from his perspective that was the only thing he could think of and you can clearly see in recent chapter that he don't have any interest to have sex with that twink. I just don't get why the blondy getting unnecessary hate he is pretty cool so far.

Well it’s that he’s just making the bottom fuck him with an excuse he didn’t even hold up to. Then gets upset when dude isn’t in love w him haha (they’ll get there tho). Bros not thaaat bad but it’s funny to see him scramble. First time liking someone and he crashes out. Not trying to hate on him but he ain’t perfect