Description
Since we were kids we always been very competitive with each other, my half-sister and I, and while we were growing our challenges got a lot different. Our mother is always saying we are always testing each other's limits, and it's kind of true. I can say I discovered sex with my sister when I was 15 and she was 14, since then most of our bets always involve sex. No one knows but us. I play basketball and she bet with me that we would lost the game because traditionally we loose most of the times with that team, but this time we won. She lost the bet and I got the right to have her ass for the first time.
