This is tagged as smut though. So yes you are reading porn.
And sex is a very important story building tool in this story. It's used as a weapon by the Boss. To torture and beat into submission.
The sex the two MLs have can be moments of them connecting deeper, learning about each other. Or like we're seeing now, as a way to avoid having difficult conversations and to feel closer to each other as they both are experiencing emotional hardship.
The story is interesting, but so is the sex. Bc that is important to both of the characters.

It’s so frustrating when a manhwa over uses sex scenes, especially when the story is actually very interesting, chapter36 just came out and once again they’re just having sex. Don’t get me wrong I obviously enjoy nsfw scenes, but it gets to a point..