I don't know why dear forum friends are thinking that Anand is wrong by feeling bad when Naina hide her affair from him.
I am a mother of a 16 year old boy. I will die 1000 deaths at a single moment if my son is hiding something like this for such a long time. I am sure there a lot of parents in this forum. What will be your reaction if your kid is falling in a love affair and hiding it from you for such a long time. Will you appreciate your kid for doing like this or will you scold them. If it happens to me then I will be really depressed and may take days or even weeks to be back to normal. I know that my son will like a girl sometime and he will also have affair but hiding from me for such a long time, I can't think about it. There were situations in which Sameer was going in and out of house freely like a family member and at that time also no one suspected anything. If you see this situation from a parent's eyes then it is clearly a failure of being a parent. You can't even take care of what is happening in your own kid's Life.
Hoping that I made clear of Chachiji's situation through the eyes of a parent.