[oxy.raj]

In Case of Jay & Nikkitha, the subtleness is both want each other exclusively they don't want to share, they are not okay with idea of outside sex, given they realize their love for each other. 

This story is actually a reverse. 

Jay is not helpless she started understanding better, that's why he wished the Mithra soon turns tharun to her side.

If you look at ending, Nikki just rushing for second round just to be with him. She have no reasons to be with other men now, she never wanted it any more, but i dont wanted it to make a moral compass. Instead a subtle hint. 

She would say she would break his legs, when he speaks about Sharmi. 

Jay ultimately dont want but adjusted for her, Nikki allow the talks for fun, but she becomes possessive and jealous. 

in both cases they dont want their partner to have an affair outside, but they are planning out , making effort to understand the needs given situations and other factors. 

When story ends, they are available only for themselves.  But to achieve this place, such openess, honesty and clear verbal communication becomes the bridge.

Thanks for explaining your perspective, this actually makes the ending and the 'subtlety' a lot clearer.

I read Jay and Nikki’s arc the same way, underneath all the experimentation, both of them are moving toward exclusivity, not away from it, and the outside sex is more a phase born of circumstances than a permanent desire. The way Nikki rushes back for a second round purely to be with Jay, and how she reacts jealously to Sharmi even in a joking context, really sells that she no longer wants anyone else, even if she doesn’t make a big moral speech about it.

Similarly, your emphasis on openness, honesty and clear verbal communication works, it’s messy and not traditionally “moral,” but it’s believable that this is the bridge that gets them to a place where they are only available to each other.

I also like that you kept it as a subtle emotional shift instead of a preachy “open relationships are bad” conclusion. The possessiveness and jealousy are shown in small character moments rather than declarations, which lets readers infer the change in their dynamic rather than being told directly.

Thanks again for  the wonderful write up, its clearly demonstrated the relationship intelligence throughout the narrative!!