"Hey you lovebirds, until when are you going to smooch?"
Ara was startled by her brother's voice, that she immediately pushed Kou away. She would normally face her brother with an embarrassed, guilty face. But the occasion was a happy one, and so she faced him with an embarrassed albeit jovial one instead. When she couldn't take it, she picked up the puppy so she could hide her scarlet visage behind its soft fur.
The Koutaishidenka, on the other hand, looked a bit miffed upon being disturbed. But looking at Ara's brother, and the people behind his future bother-in-law, he already had an idea that Aki was the sacrificial lamb to disturb them since the others were scared of him, and so he relented. He couldn't scold his fiancée's brother over something so trivial anyway.
