The remarried parents were on a trip, and the younger sister, who was usually treated like a child by her older brother, started to tease him. The older brother reacted to his younger sister's panty flash. While she was teasing him, she said, 'I can at least make my big brother cum!' and masturbated herself, causing her brother to ejaculate. The older brother, still excited, pushed his younger sister down, but she too became excited, and the two continued to have sex greedily.
