Okay so this happen about 7 years ago. We (my sister and I) used to go to summer camp every year. My sister is a year younger than me and still looks like she's in her early teens now. At the time this occurred I was fourteen and my sister had just turned 13. We were regulars (as all the girls were) but this year there arrived a new girl and from the start we hated each other.

Anyway third day into the stay she had become the most popular girl at camp and the other girls became her "slaves" doing anything to impress her. One of these girls was my little sister. That night when my sister asked if there was anything she could do for the new girl she was instructed to be the entertainment. To do this she had to strip to her underwear and dance. This annoyed me and as the night wore on and my sister got more humiliated I snapped. I challenged the new girl to a poker game, as the game spent up all my money (deliberately) I made my final bet. Winner takes all and by all I mean all. Money, clothes and freedom of the loser. Confident she accepted as I cleared up that the bet meant that the loser would be the naked slave of the winner for the remaining fortnight.

As the cards were put on the table my heart raced and panic set over me. She had a very good hand, a normal game winner however not good enough. Her faced dropped as she realised what it meant. I made a promise to her. She would have to do two things here in front of the rest of the girls then from then on her humiliation would be private for me and my sister.

Her first task was to dance like my sister had to, this amused my sister a lot. The second was to remove her underwear and wear her knickers (if I remember rightly lace red panties) as a crown. This and a "royal walk" to my cabin for her tasks.

When we got there I noticed her figure was that of a girl older than me and she informed me she was sixteen. I made sure every inch of her body was visible to me by naked star jumps, sit ups and press ups etc. For a few nights following I loved have a naked slave but she begged for one thing. To buy out her debt. I said she couldn't afford to but she advised no matter how humiliating she would do it for freedom. So my sister and I decided to get her to masturbate in front of us while bouncing her fairly large boobs. It took her ages to cum but once she had she asked if her debt was repaid. I let her off as long as my sister and I remained immune from retaliation.

Best camp ever and actually the girl, she was a bridesmaid at my wedding this summer and will be (she will find out next week) godmother to our first child.