A small family on the outskirts of the city has a young couple living with their paternal family, everyone who looks at it, they think this is a happy and happy family, but they don't expect that there are many other mysteries inside. The husband unfortunately suffers from physiological weakness while his wife is in her youth, so she always desires sex, many times her husband "comes out early", she has to go up to watch black movies on the Internet and masturbate herself to satisfy her lust. Of course, the eldest brother knew that his brother was like that, so he understood what his sister-in-law was lacking, and he was just waiting for the opportunity to act.