I am kind of hopeful at the moment (although things can change anytime in this show). With Disha being stabbed, it wouldn't be a bad thing to see DK playing doctor and take care of Disha. Our hero has difficulties seeing her inner pains but when it comes to physical pain....doctor to the rescue (i.e. handkerchief scene, when he gave her the bruise, etc...) He can be very affectionate to Disha, tend her wounds, serve her every needs.
Maybe after seeing this caring side of DK, lady D might just give in to his needs.😉
As far as Gargi. It is her nature to kill. Dhruv, Dev, the guy in jail (forgot his name). So her taking out a knife to kill Sumi doesn't surprise me at all. She will do anything for her advancement.