that was the first time he raised his voice on her. that was the first time he sounded so irritated by her. that was the first time she got taken aback by his reaction. that was the first time she's afraid of continue ranting on with him. because he sounded so fierce... because she knows she's at fault. she dont know how to show her guilt. she really thought that it would be done when she apologises. yet she irritated him instead.