After yesterday's epi this line best suits Devga. I mean both Dev and Durga. Durga knew Dev loved Nithya. She had the power to manipulate his love for her purpose. But she didn't do that. She let go of him. She never for once tried to force her new persona on him or try to get any favours from him.
Post marriage there was no need for her to suffer his hatred if she had decided to reveal her identity. But not even once she tried to take advantage of her marital status with him. She quietly went on doing things for what she had entered that house.
Result Dev came to her . He understood why she was doing what she was doing. He didn't hold any grudge against her after knowing the truth. His love for her didn't reduce after knowing what all she is doing to bring the culprit to justice. In his mind by now he has accepted her for what she is
Now Dev after knowing the truth that the woman he was so desperately searching is actually his wife he also didn't take advantage of the situation. Instead of giving in to emotions or forcing his love on to her he also has decided to let her go. He respected the need for her new identity and the space she needed to do what she was doing.
He only decided to keep with her the relation she was most comfortable with, that of a friend. And I am sure by walking along side her as her friend allowing her to be what she is, she will come to him accepting his love wholeheartedly just as he has accepted her new persona
They both have let go of things dear to them to get it back. And this exactly what that differentiates them from Raj-Sakshi who believing in snatching away things to get upper hand in the relation than allowing the relation to blossom on the basis of mutual trust , respect and love.