The trio and my assumption
Vansh -
Vansh was aware of Kabir and his disguised arrival .He wanted to catch him red-handed .BUT This was not enough . now he needs to know who is the ally staying in his home . He just wanted to blow out the cover the mask .He was not going to shoot kabir ... becoz he could have done that way before . He just wanted to bring the person infront of everyone who is helping Kabir .So here it is ...she is riddhima .its quite obvious he knew riddhima's where about too... kitna avi bhi nhi pata
Riddhima- Riddhima saved Kabir due to her natural instinct , her past and due to her unaware state of kabir's identity .She saved her not bcoz she loves kabir .
Kabir - Ragini is the major weak point that he has to trouble vansh . Kabir himself is unaware of ragini ...only vansh knows about her and he knows she is very much alive ... Kabir just wanted to make him angry and was aspiring that he will blurt some truth ,Then again ,It will make Riddhima rehink whether vansh is liening or not .
conclusion-Either Riddihma will manage the situation by giving lecture on murder and bloodshot in home Or both RIANSH will go to their ENEMY ZONE and their hide and seek will start with SEARCHING RAGINI .... Riddhima will not b out of mansion or her identity wll not get revealed.