There are two ways to think of this:
Varsha and Satish should have been honest and not hidden the abortion from the agency.
Archana should have given her sister importance over outsiders (read MAdhuri) and told Manav; Manav should have had the sense to know what to say.
From an idealist's point of view, the first point holds valid. Varsha and Satish should have been honest. But from a practical point of view, is what they did so wrong? Don't we all at some point or the other hide the truth due to a variety of reasons? Knowing society's attitude towards abortion and women who opt for it, is it so wrong for Varsha to think it's better to not bring it up at all? After all, a woman who chose abortion at one point in her life isn't necessarily unfit to be a mother and all that crap. And then, officials at the agency are only following a rule book and then using their own opinions of right and wrong. They aren't God to decide who is fit to be a mother and who isn't.
So personally, I don't think Varsha and Satish were so wrong in deciding to hide the abortion fact. The reports only said Varsha cannot conceive, it did not say why.
On the other hand, the second point, in my opinion, is far more valid and to the point. Archana FORGOT such an important matter. She had the time to have candle light dinners with her husband, attend parties at her parents' house, fight with Vaishali for Madhuri's sake... but didn't have the time to tell her own husband about such an important matter? It can only mean that Varsha was right in saying that she isn'timportant for Archana! If Archana had said that she and Manav will not lie for Varsha, that would be a different issue. It would mean she is being an idealistic fool, but that's in the vein of her character, so it's palatable. But this excuse on her part is ridiculous!
As for Manav, one can only conclude that Manav is a bumbling idiot with absolutely no common sense. Which fool will think that saying a woman was concentrating on her career and not her baby will go down well with three middle aged people taking an interview for adoption?
And now to top it all, he says it's not their fault at all... this is the limit! Manav and Archana are not always right. They definitely are not in this case!