Raj is not a fool to waste all money and energy on a son that doesn't belong to him. Shaurya has to be his son too.I also have this feeling for a long time about Sakshi... looking at her domineering being and condemning Rajnath most of the time in Shaurya's affairs... that Shaurya is Sakshi's son from her lover and she just married Rajnath to get a name for her child and whoever she loved is part of the Goenka's