We can say he's overreacting if you consider that he didnt even give Nupur a chance to make her point..but being Mayank, its understandable. He's very into his work and serious abt it. Nupur didnt do her work herself, on top of tht she lied to him..and he had just started to think of her as a good friend. His reaction is justified but I hope he doesnt take it any further. He was really harsh over the phone.. :( Forgive her now..