She hits him where she knows it would hurt the most. She is someone else's wife, does he not even have sense to not interfere between a husband and wife's matter? How dare he come in to their room. Of course she doesn't really mean all that but she wants to hurt him really really bad.
SARAS: Yeh Kisne Kiya?
He doesn't care about what she said. His eyes are gazed on her blood filled forehead (sindoor?!). He wants to know who had dared to hurt Kumud.
KUMUD: Kisi SARASWATICHANDRA ne.
Mind you, she says this to Navinchandra. Some Saraswatichandra put her in this state. He is the cause of this agony and this never ending angst.
She hurts him because she's hurt herself. He is the cause but he is also the one she can release this otherwise suppressed pain on.
Hats off to the dialogue writer, the two insanely intense characters and the two power-packed actors.