``When you have sex, the hymen regenerates and the vagina gets blocked.'' A lie told by her brother causes her ignorant sister to go wild! I thought it would be bad if it got blocked, so I inserted my brother's dick without permission! The younger sister, who has learned how good she feels, is so absorbed that even when her older brother says, ``I'm cumming!'' or ``I'm already ejaculating inside!'', she doesn't notice and starts pounding the piston!