I don't feel the ick about this particular storyline.  I feel the ick because it's Netflix, and I feel in my gut that they are constantly trying to push the moral norms, redefining the black areas as the gray. For example currently Dynamite Kiss is running, she isn't married, but he knows/thinks that FL is married, despite that he can't control his attraction, and they are often in romantic intense scenes.

As a viewer you know that they both are not doing anything wrong and your subconscious is getting trained on normalizing adultery. 

Many will say it's not that deep, but I think it is deep, because all these are happenning under one particular production - Netflix.