Dhara should get a DNA test, and prove the to be child is Vardhan's and then she should slap him a few times, divorce him and never let him lay a hand on her child as he called it "paap"... that will teach the vardhan a lesson to insult a girl and her to-be child!
If they decide to show a DNA test in the show... they better not change the reports like it always happens as that will be limit! ...hehe