Bani's baby's parentage

Why does evryone think that JW will doubt the baby being his.

They were together when baby was conceived that can be easily known. Bani has mentioned couple of times about baby being theirs or being their Pyaar ki nishani.JW has accepted that.

So even if he doubts BAni's love🤢😡. ( that it self is stupid but). He won't doubt the baby's parentage.

I know I wonder where on earth people are getting this crazy idea that Jai will question the childs parentage. As for Jai questioning Bani's love, I think, no I'm hoping we get to see another June 19, in the full sense, this time however Jai being the jealous and confussed one and Bani trying to make him understand.