Adi mad mad kyon hai? --- He can only blame himself--- all those lies. It's now going to catch up with him and even interfere with D and K. What "sach" is he going to tell his mom? He can only tell lies.
Adi sad sad kyon hai? --- Because he fears loosing K, but she was never his, and what do we say about taking others' things without permission???? He wants to continue his lies...his fake relationship and break others. What's going to happen when K's memory comes back and she doesn't recognize Adi and become Dev ki diwani. This man Adi doesn't seem to think about consequences.
Anyway it was nice to see the brief but nice D-K hug. Maybe Kajjal will start thinking after this and her poor little brain will cooperate with her and the images of the goons will fade away.