Sneaky Siblings

While we are hanging out, i bring up the fact that you have been bringing home a lot of girls. i say its probably because of your car, while giving you a hard time. you tell me its because of your big dick. i tell you thats probably not true so you flash it to me. im stunned, you just flashed your sister! you are right though, its really big and nice. you decide to show me again and tell me to touch it and after that ...we dont stop.