At first Luna just thought he was playing but when she felt his lips on hers her eyes widened. She didn't stop him in fear that he would be upset and go to her sister, but she didn't neccasarily kiss him back either. She felt his tongue in her mouth and blushed, this being her first make out ever. She eventually started to pull back, smiling a bit. "You sure are passionate, big brother. I love you too." She then began to laugh, but a small part of her felt a strange sensation between her legs.