Victoria and Ruth, both 17 years old were sun bathing in an enclosed part of the back yard. Their tops were off and their bikini bottoms pulled up to resemble a thong. Looking up, they spotted Victoria's 15 year old brother, Jason, and Ruth's almost 15 year old brother, David, up in a tree, spying on them.

"What are you two looking at!" Victoria snapped.

"The best looking buns I have ever seen!" replied Jason. "You know, David, we can say a lot of bad things about our sisters. But when it comes to the derriere department, they rule!"

"Was it last year or the year before," Ruth asked, "when we spanked these two's bare behinds for peeping at us?"

"It was three years ago," said David. "And, dear sister, we have changed a lot since then. You can try to spank us if you want to, but I bet we tan your behinds instead."

"So we can't use muscles, but we can use our brains," Victoria replied. "How about we challenge these guys to a game of strip poker. Losers not only have to show everything, they have to let the winners give them a good, hard spanking."

"You're on!" shouted the guys and jumped into the enclosure. After getting on enough clothes to make it even game, they started playing. At first it seemed that the girls were going to win easily, but then it seemed like they couldn't get a good hand. Soon they were down to just their tops and they lost those.

"Do we pay up or do we run for it?" Ruth asked Victoria.

"We will catch one of you now, and the other one later," threatened Jason.

"Yeah, we better pay up," said Victoria. The girls throw their tops at the boys then danced around naked in front of them. Finally each dove other the lap of her friend's brother. The boys started spanking them and were surprised at little protesting the girls were doing. The girls even seemed to be enjoying the spanking.

"All right, that is enough," said Victoria. "I don't want Mom to catch me with my pants off especially with a red behind. You guys are going to give us the chance to get even, aren't you?"

The boys were definitely in favor of a another playtime with the two older girls.

"I have an idea," said Ruth. "Let's all go up to the lake. There won't be anybody there during this week. Our moms wouldn't let us go up there with other guys, and not by ourselves. But they won't think twice about it if we go up with our brothers."

The girls went to shower. Jason told David, "go home, grab all the money you've got and meet me at the drugstore."

Suntan lotion and other sundries for the beach: $12.00. Big box of deluxe condoms: $35.00. Finding out that your big sister is kinky, priceless.