Nahi re bechaara Angad loves Sahiba. Thats why he enjoys how Seerat redecorates his room, changes his shirt, arrange candlelight dinner dates, her rain dance, EMA offer, etc etc. He's so committed to Sahiba that Seerat can say whatever she feels like to insult Sahiba but he will stay mute.
Pehle yeh tha that Sahiba enjoyed Romis "touches" and now she gave "passionate" hug to Angad who is interested in her sister and came there to dhulao Romi. Basically Sahiba galat hai- yeh bolnaa hai lekin kyun galat hai- yeh decide nahi kar paa rahe hai. Toh mood ke hisaab seh aaj kuch, kal kuch aur.
Angad drunk hokar Sahiba ko molest karna chahta but "bechaara" kar nahi paaya. Lekin galti toh Sahiba ki hai.