So many things were very unsatisfying with this story (though kudos to the translator), but the main thing I hated was how Kouga's neglect from his parents was brushed off when they all reunited, just like that. And now they have a new child with whom they'll do all the right things with and be great parents to without even compensating their older child that they abandoned because they were too weak to protect him. Yuck.
That last scene too, with the abused omegas fawning over the old man who was their abuser. Wtf was going through the author's head when they wrote that? Double yuck.
Tbh I think them having sex first is fine? Just to get the stress and frustration out before actually sitting down and communicating (if they do communicate next chapter). They're clearly on edge because of the situation. It'd be better to have a conversation when they're not so strung out, so the sex would actually help.
If Yusung's ending up with ONLY Taewon I'll be disappointed big time. This is already a fantasy/wish fulfillment story, why can't he have all of them? To be 'realistic'? Nah. To hell with convention. If he does that he basically used them just to dump them rip.