Finally some constructive thinking. What makes a couple stronger - overcomig difficulties if their not it brakes, if they do it only makes it stronger(they both choose the path of sharing their love), not some lovey dovey, always holding hand type things. How much I should repeat myself, for me it would be nice seeing them prevale on corrupted world, it has it's own charm and I will be totally happy with that outcome. At the same time it would be hot to see them fall into total debauchery, while it still making an interesting story. I'm not here for a certain outcome, I'm here for the story, hope it make sense for you.Do you know why normally its 35-40 yo couples that set boundaries and limitations? Because those are the one that actually do sharing and swinging in real life, fundamentally no couples that haven't been in a relationship for a significant amount of time would even consider that sort of lifestyle, its basically measure to reignite tired relationships. So yea the logical framework for that sort of relationship would be based on those that actually follow that sort of relationship.
Do you know what actual college students do? Cheat on one another. Fuck anything that move that catch their eye. Its not a actual sharing or swinging relationships. But the problem is the premise is that the story is about NTS, performed by a college age couple, which shouldn't be happening. So since those two concepts are not compatible you have to embrace which ever is the dominant concept, which by the Dev's decision has been NTS, so it should logically follow that framework even if its applied to college students.
Also since this story is clearly meant to finish happily, your 'mistakes' normally lead to break up, not a happy couple, so since the premise of this story require the couple to still stand strong at the end it require avoiding the mistakes you believe they should be doing carelessly for your excitement, because you don't care whatever their relationship succeed or fail, because due to your own proclivity you consider any endings that meet your 'excitement' quota to be favorable, even if it goes against the intended narrative.