I feel the way they are taking the serial they are going to show that JW is indeed the father of Pia's baby. They are doing a few things to make that ok for now so that they can take advantage of the storyline later. They are showing that Bani is forgiving Pia, she might not talk to Pia but she is monitoring Pia's progress. For humnanity I can understand paying the bills but actually taking and interest in the growht of baby and Pia's health means Bani has accepted the baby despite it being the fruit of rape. Also they are bringing back the old Pia who cared for her sisters. I think I read an article by the dialouge writer Rakha Modi where he says that Pia will now be given whiter shades. So if Pia is hsown to be good and repenting than we might accept her baby.
The major indicator is that both Pia and Puskar are willing to keep the baby and themselves away from the JB equation and that means that the baby is really JW's otherwise they would have created a lot of drama till the reveal happened that the baby in no JW's. So I think for all intents and purposes we are stuck with a JP baby. They will play thin angle up when the babies are a little bigger and Pia wants money again and by than the disgust factor in people's memory would have gone down.
As days go it is becoming more and more certain that they are going to hang the paternity on JW. I think pooch has gotten the DNA which tells the baby is not his and realistically he was the only other option.
meghna