Hypocrisy is glaring.
Angad wants to do kanyadaan of bua who has taunted him all his life and was stupid enough to agree to fund extravagant things for her wedding to a rich guy whom she's remarrying for paisa. Angad let Seerat off the hook multiple times and even now tells her to approach him for her material needs but Sahiba should slap her sister. Aur uss ke kya hojayega?! I'll be honest- I'd love to watch Seerat slapped but whats the point of it in terms of overall scheme of things. Will seerat stop her antics if she gets slapped?! No chance at all. Rather she'll be even more spiteful than she already is.