Dutta is falling in love with Naku and he is in the process of understanding that and himself. Once Anna belittles Dutta by saying it wasn't Naku that betrayed him, Dutta will naturally blame Supriya for lying in her letter, and want justice for Naku.
I could see him putting out an all-points-bulletin 😆 on Supriya and her button-popper boy-toy. Then I think we may see fireworks, and Naku may even believe there was someone else behind this scheme. I don't think the CVs will expose Kala and those idiot na? sisters of hers anytime soon, but this could change things in Naku's eyes about what the sisters are really like and the threat they pose to her and Dutta.
What say you?