Ok one thing I inferred about the discussion is that it is related to Ahaan telling the truth and about the child.
I feel he really should be truthful. He may take his time, fair enough. But before telling anything to Rhea/giving any opinion he should talk to Ishqi.
And about the child adoption and personal opinion and everything, I think personally I would be more concerned about the child. Most concerned rather. Jiski bhi mistake ho, jiska jesa outlook ho and society kesi bhi ho, that child should not suffer. It will be as it is scarring for such a child not to have a "normal" family. The least one can do is take responsibility here ( assuming Ahaan is the father ).
And yes it is easier said than done but when you really believe in a cause I think it does become easier to do it. The child's future is a big big concern in such a case.
And it may sound weird but I would be more than okay with the partner having a past. A past would mean experience, lessons and awareness about oneself ( obviously it depends/varies) case to case but experience ( including sex ) is nothing to be judged on the face of it.