The one thing Ghum has done well is keep Pakhi consistent as a character with a trajectory that is growing more and more desperate as time and Virat pass her by. So, what exactly does she want?
1. An actual physical affair with Virat.
I actually don't think she has the guts for this. Her favorite bahu image will be destroyed beyond repair if it comes out. So this is out even as a thought.
2. Emotional closeness with Virat
She does seem to crave this. She herself admitted to Virat in their episode long confrontation that the only thing she wanted from him was that he not give her place in his heart to any other girl. But this is clearly not happening and Virat has told her to her face that their relationship never even took off so she's mooning over something that's non-existent (minus that idiotic vaada). The friendship she had with him seems to be crumbling too.
3. Sai to not have Virat
I think more than anything she wants this. It hurts that Virat doesn't love her. But it hurts even more that he loves Sai. I think her hatred for Sai eclipses her "love" for Virat. It pushes her to do absolutely crazy things like barge into their room on the flimsiest of pretexts or want to go out with him alone in the car like today. She is really coming off as unhinged now. The character has zero self-esteem if she is only valuing herself in terms of what she can have with Virat by pushing Sai out of the picture.
Let's assume she gets number 3. Sai doesn't get Virat because she doesn't think she can have him. But Virat still loves Sai and probably will resent Pakhi even more for driving a deep wedge between him and Sai. It hasn't happened yet, he has so far only been firm and told her off. But when push comes to shove if he stands to lose Sai, he will undoubtedly take it out on Pakhi. So what does Pakhi gain ultimately? From what I can see:
1. She is miserable
2. Virat is miserable
3. Virat may lose Sai but grows to dislike Pakhi even more
This is a zero sum game for Pakhi. If she manages to push Sai out, she wins, but Virat loses which means the end result is nil. They need to explore the character's motivations a little more. Her monologues tell us she is getting desperate and just wants to spend time with Virat. But what's the endgame for her? What is she thinking she will gain by doing any of that when the guy (who has broken his promise to her no doubt) has clearly told her he's in love with his wife.
If she is mentally ill (and she better be 'cos this is not normal behavior) then she needs help. Someone (and no one better than Sai, solver of all problems except finding missing gifts!) needs to help her gain some much needed self-esteem and find a footing for herself. Virat is not such a prize that she should lose herself for him - no man is that!
By the way, as a woman, it hurts to watch Pakhi lose more of her dignity every day. Beizzati jokes apart, she is clearly losing it. As Sai told her once right in the early episodes - "Apni izzat apne haath mein hoti hai."
So, where's Pakhi's izzat? Clearly, Ghum hai kisikey "pyaar" mein.
That was long..whew! Thoughts?