Sira thought that Kris was going to argue with her for being rude to both her sister and him but he didn't say that .
He just stood there next to her while leaning towards his car and looking to the river that was frozen, then said:" I don't know why you are trying to act this way, we have no record of being in a relationship, in fact that's something outrageous even to think about that possibility, yet …you are acting as if I cheated on you "
She never understood why Kris was thinking of that possibility like that, she couldn't express herself more before but now that he was acting this way she just said to him with a very angry expression:" You're not denying it "
Sira knew at that moment that her sister was not lying to her but somehow she wanted Kris to deny it too.
She just had to get that affirmation from him but sadly he didn't give her what she wanted.