That night Jason wore dark clothing so he would be even less noticeable on his balcony. He draped a blanket over the railing so that he was covered and he waited for Shelby and her boy to come out to the pool.
He was lost in thought thinking about her mouth on him when the door to the yard opened and out she came pulling a young man behind her.
This kid was dark haired and more solidly built than the last, and Jason could see why she might want to sleep with him, the kid was handsome and chiseled and pretty much a prototype of the high school jock.
Shelby wore her teeny blue bikini and looked absolutely smoking hot. Her hair was loose and flowing down her bare back, her breasts were spilling out of her tiny top and her luscious ass naked except for the bunched material being swallowed between her perfect round mounds.
The two high school graduates walked to the pool slowly, looking at each other hungrily. The energy between them was overtly sexual and Jason felt a pang of intense jealousy.
Shelby sat on the edge of the pool and dangled her feet in the water. The kid joined her and sat very close. As they brushed shoulders and legs they gazed at each other so intensely that Jason felt as if he should leave.
Just as his impulse to get up and leave them alone peaked enough for him to gather himself to stand the kid leaned over and kissed Shelby, stopping Jason before he could move.
Suddenly the voyeur in him came on strong and his cock sprang to life as the two teenagers began to kiss and stroke each other in the dying light of a summer evening. It was idyllic and erotic enough that Jason stayed where he was remembering his little cousin's request to watch over her.
The young man explored her skin with his hands, stroking Shelby's face, neck and arms as she leaned her head back and allowed him to ravish her mouth and face with kisses. Shelby's arms had lifted and her hands traced arcane patterns on the boy's skin, running over his muscles and printing mysteries on his flesh.
When the boy's hands began to stoke along her chest working toward her breasts Shelby sighed and pulled away breaking the spell.
"Let's swim." She said, and slipped into the water disappearing from view.
The by groaned and adjusted his raging hard on while she was under water and Jason smothered a laugh as he too had to adjust his uncomfortable erection.
The boy let himself fall into the water and the two teenagers began to swim easily, prowling around each other slowly. The boy tried to get close and kiss Shelby, and every so often she would let him, and then dart away once more.
When the game became a bit forced a few moments later Shelby moved away and stared at the kid, just her head visible above the darkened water. The sun was almost down and the reflections of the porch light were becoming the predominant light source on the water.
"Liam? Have you ever skinny dipped?" Shelby asked and threw some wet material at him.
The blue bundle splashed near him and Liam reached out and took it, holding it above the water and discovering it was Shelby's bikini top.
"Nice!" He said and threw the top to the pool side concrete.
Both teens treaded water as they rummaged around below their waists presumably pulling off their bottoms.
Each held up their bathing suits triumphantly at nearly the same moment as they proudly showed that they were now bottomless.
Then Liam tossed his suit to the water's edge and began to move toward Shelby. She threw hers away as well and began to swim away from Liam. A chase ensued as Liam tried to touch the now nude Shelby.
They splashed and laughed and screamed while naked swimming. Shelby stayed in the deep end near Jason and he could carefully peek over the railing and see her naked body flashing in the dark water, a pale streak in the near black depths.
Liam was strong, but not as lithe and agile as Shelby and she managed to avoid him for some time, but neither of them wanted to remain apart long, so soon he caught her, trapping her in a corner of the pool, very near where she had let the other kid lick her pussy not so ago.
The energy in the backyard changed dramatically as Liam pressed close to Shelby and it was clear she could not escape. Shelby became still and shy, and Liam closed in, but became less predatory. He was still just a kid, eighteen and nervous.
As he got closer and closer Shelby clung to the side of the pool, her breasts were almost exposed over the top of the water, but remained tantalizingly unseen. Liam took hold of the poolside on either side of her small hands, his greater reach allowing him to fence her in completely.
The two teenagers kissed and Jason could well imagine their smooth wet bodies slipping around on each other for the first time, Shelby feeling that wet hard cock sliding across her skin. Once more Jason felt jealous, but the powerful sexual tension was more exciting than anything he had ever experienced.
The teens kissed for a while longer, their hands now wrapped around each other, except the one hand Liam used to keep them both above water by holding the pool edge.
The abruptly Shelby pushed him away gently.
The fit little woman pulled herself out of the pool backwards revealing her toned body to the horny boy right in front of her, and the aching man hiding above.
For a moment Shelby sat on the pool side, her legs slightly parted showing the wet mound of her pubic hair parted over her dripping lips. Her athletic body gleamed as water streamed off her smooth skin and highlighted her tight muscles in the glare of the porch light. Her hard nipples pointed at Liam and he tried desperately to view every inch of her skin as she sat nude before him.
Then Shelby stood.
Standing exposed her body etched in the light of the house, water dripping from every part of her; Shelby was transformed from a teasing little girl in a too small bikini into a woman with a powerful sexuality to her.
Every line of her stance said "Now."
