Definitely going the Ramayan way, where he will suspect Naku period. With whom now it does not matter. Any woman will not tolerate this type of accusation more so coming from her husband itself. If Sita could leave Ram, who was the epitome of being the ideal husband, Dutta is nowhere close to that pedestal, so she should separate from him. At that instance, maybe she does get kidnapped by Anna's twin or Chaskar, and Dutta is forced to save her. There he notices her scars and then finally starts thinking, which unfortunately he is not doing right now.
How stoned was he that he could not even remember what Naku did???????
....Throws chappals at Dutta today, sorry ladies, but I think he deserves it, for not thinking.