Dadi is inhuman, she does not have emotions. I don't know what you'd call a woman who enjoys breaking her own family, a family that has been trying to recover from a tragedy that occured over 14 years ago. You don't even do that to your enemy, and she does that to her blood. They gave her so much respect, considered her to be the patriarch of their family, and she gives them nothing but pain and sorrow. She CANNOT leave before rubbing her nose on Khushi and family's feet and begging them to forgive her. That's the gravity of what she's done today. Typical women mentality 'my son is glorious and perfect, my daughter-in-law was weak and couldn't handle infidelity' Disgusting woman!
I beg to differ about Arnav though, the way the flashbacks were shown made it seem like ASR was weighing his past and present and having second thoughts about Khushi. I thought that as soon as he'd think about Khushi or those flashbacks where Khushi said those trust words to him, he would rush back to the wedding and offer her an explanation. For me, he is someone whose foundation of love and trust is so weak he has to think a thousand times before deciding his priorities. Put him in a tough situation and he would fail you, and that's what he did to Khushi today. Failed her.