A 180-minute feature-length special with the first double cast in the "10 years of sucking my sister's boobs" series! A strange 10-year story of two older sisters with opposite personalities who continued to suck beautiful big breasts from school days to adulthood. The strong and sober eldest daughter (J cup) and the bright and tuned second daughter (G cup) sympathize with their younger brother who is useless no matter what they do, and pour their motherhood ...