His aunt doesn't let him.

Before K-T could put his clever plan to execution and get his hands on Lily's yet to be oiled body, his aunt Jill shattered his hopes.

"Come on girls, let's get some protection from the sun. We don't want to burn on the first day. K-T, do what you can to get yourself covered and I'll help you with the bits that you can't reach." She announced. Emily and her friends were grinning from ear to ear, losing no time to oil up Lily and each other from head to toe, making sure that K-T was seeing them groping his crush's tits in the process. He really was not close to losing the erection he got when the girls had removed their tops on the ferry and at some point he would really have to find a secluded place to jerk off.

With his aunt making sure his back wouldn't burn they were ready for the beach. He wouldn't say that his sister had not given him a good show, he just had hoped he could have had a more active part in the process.

The girls put down their pareos and flip-flops at some lounge chairs to mark them as taken and everyone ran to the sea. The water while still warm was refreshing in this searing heat.

Most of them just jumped in the waves, diving under the surface to fully get wet. Quickly a splashing game ensued, involving everyone except for Jill who simply began swimming farther from the group, letting the youngsters have their fun. They all were laughing and having a great time for a while until just splashing around to get the others wet became a bit boring.

"K-T, can you go get us a beach ball and some inflatable buoys?" asked his sister.

"Sure," he replied. He didn't really want to be her errand boy for the trip, but if making himself a bit useful was the price to pay for some tranquility he was ready to accommodate her.

He got out of the water and crossed the beach to one of the stands that lent beach gear. They also had drinks, which was a good thing since he was thirsty again. The heat was making him sweat a lot and he remembered his aunt's advice. He ordered a Globo Agua one of the two local drinks he knew and drank it while the charming lady behind the counter inflated the things he had picked. He had almost ordered the soda, but he thought it was best not to drink too much of it. He had not noticed that he had let himself go like that lately, his torso that once had the beginning of nicely defined pecs looked all flubby today. His choice of drink had seemed to perplex the cashier, but he had no idea why.

He came back to water holding three giant inflatable rings and a huge beach ball. He had one on each arm, one around his neck blocking almost all his vision and he was holding the ball with his hands.

"Thank you K-T. We'll take two and the ball, we'll leave one for Lily and you. I'm sure you want to have some fun of your own." said his sister. It was uncharacteristically nice of her but K-T didn't look further into this, he was too happy to finally having some vacation time alone with Lily. What he didn't notice was that Emily's help in getting the rings off of him was just an excuse to untie the loose simple knot of his swim trunks. Soon the string would loosen and at this point K-T's erection was pretty much the only thing holding them up. They had got heavy with water, but walking slowly in the water wasn't enough to kick them off so far.

Lily climbed on the ring and sat down in it. From this position K-T wouldn't be able to see her perky tits once they reached the point where he would be **** to swim. The other girls were playing some sort of game where the two on the rings were passing each other the ball while the last one was trying to catch it to replace the one who lost it.

"Come on K-T, let's swim farther. Can you push me?" asked Lily from her floating throne. K-T was all too happy to get his princess far away from his sister before she did anything to embarrass him.

Pushing the floating ring against the waves wasn't easy and he got quite the sweat before getting to a point where he was out of his depth. At some point as they were going away from the shore the sand ended and there was an underwater cliff, the bottom after that was 20 or 30 feet deep. It was beautiful, the crystal clear water let him see colorful fishes and a lot of underwater life at the bottom.

Looking more closely he spotted something blue descending to the bottom. The twirling rectangular shape was rapidly recognized, especially when he looked down at the proudly erect cock now freely floating in the water. He had lost his trunks. In his struggle against the waves he had not noticed them slipping off. They were now deep enough that he wouldn't trust himself to go get them and were still going down at a quick pace. He had been busy chatting with Lily while swimming and now it was too late to do anything about it.

It was his first day and already fate struck against him. He did not know how Lily would react knowing that he was naked and fully hard while talking to her.