So far, is that Paro and Rudra's dynamic, is beyond love at this point. I don't think either of them love each other. Yes, there is an unexplained attraction, a possessiveness, a protectionist feeling, from Rudra's side. He feels responsible for her, not only because she's his witness, but for reasons unexplained, her well-being is important to him. And either he doesn't recognize that in himself, or he doesn't like that it is. So there is a constant push/pull. In front of her, he will go out of his way to point out that she is just his witness, but in private, when she's not aware, he will do whatever he can to ensure her peace (want examples? looking after her injured foot, going to Laila to get clothes for Paro, protecting her every inch of the way).
And Paro, I think at this point, beyond everything, she inherently trusts him. I know, odd it seems. Here is a man who represents everything she hates (BSD), who killed her husband, has had her captive for so long, has pretty much orphaned her, and almost every inch of the way, yells at her, tosses her around, and whatever else. But I think, inherently, she trusts him. From the first time that they met, she surrendered her physical well-being to him. Not only that he rescued her that first time, but she ran to him, and took refuge behind him, clinging to him. That has now happened 3 times.
Also, maybe this is just me, but I noticed a slight shift in her attitude towards him after he rescued her from the doctor. At that time, her mind was in turmoil. She had just witnessed her husband dying, she was tossed in jail, her entire village turned against her, and then to wake up and find Rudra on top of her, was more than she could handle, and she reacted the way anyone would. Even there, she reacted only AFTER she was able to process the situation. Intuitively, at first, she was ok. But, after Aman, calmly, rationally tells her that Rudra saved her from the doctor, you see her confusion. Not disbelief, but confusion. And then she sees him watching her, and you can see the questions in her eyes. "Why are you bent on destroying and saving me at the same time?" Since that incident, I feel that she knows he won't harm her. Whatever else their dynamic may be, he will be her protector.
And since then we have seen, that whenever she perceives danger, she actively turns to him for refuge. Regardless of how he may behave with her, I think she knows that he will always protect her. Yes, she has to stand up to him and fight for herself, and she will, but in-spite of that, when there is danger, she will turn to him.
Even more than that, she trusts him beyond his family too. She trusts him enough to keep him updated on how Kakisa is always questioning her about her background. She trusts him enough to tell him about how his Kaki behaves with his Bhabhi. She trusts him enough to come to him seeking help (with kitchen appliances). She also turns away from Sumer when he approaches her, and again seeks refuge with Rudra. If she truly did not trust him, if she hated him, she would be looking for allies in the house, and ways to get away from him. And also, case in point, she is not a naive person. If it was in her nature to trust everyone, she would have warmed up to Sumer too after he apologized. But she is still weary of Sumer, while Rudra, who's crimes against her are infinitely more, she trusts and supports in her own ways.
Paro will always fight to prove her innocence to Rudra, and she will always fight to protect her independence and self-respect, but when you peel away the layers of all the complications that caused the situation, then at the core of it, is a deep trust, that hopefully will come to the surface enough for both Paro and Rudra to recognize it.