I doubt Rajesh se koi connection hai. He married her for Kukki and the reason he's so patient with her is obviously because he ruined her life for his own selfish reasons. There is a sense of guilt underlying everything else. Although, what I do find interesting, is the fact that initially there was a slight tinge of annoyance and sadistic pleasure too. Which is now nowhere to be seen. Like the scene where he calls Prerna before their wedding and informs her how Anurag had come to him to give his shaadi ka card and how they both should go attend Anurag's wedding after their wedding that is. From that to becoming so aware of her nuances and showing patience, guilt and understanding, he's already perceptibly changing for her. And he doesn't even realize it. By letting her forge a connection with Kukki, he's also allowed her to see him at his most vulnerable, locate his achilles heel, and given her immense control over what makes him tick. That required an inconceivable amount of trust in who she is as a person, and he's shown it. In her.
ALSO KYA CHALRAHA HAI?