I think Veena already knows whatever Naren did and is just playing dumb. Today in the scene when Rohit was shouting at Naren she didn't seem shocked at his words and it seemed like she slapped Rohit because she wanted to just shut him up and not because she was offended by what he said. I think she is keeping quiet for some reason. Others were a little shocked but not Veena.
Also from what Nishi said today about Ghar mein Toofan aa jayega if anyone knows who Pooja's real parents are, I feel it has strongly to do with Naren being the father. Otherwise why would it affect their family.