Grayson sat up on his bed, sunlight streaming in from his window. He reached for his buzzing phone and switched off his 10:00 AM alarm. Excited, he crawled up to his window and slowly peeked over the ledge. By the pool was his younger sister, Amaya, sunbathing on her back in a black bikini. Their backyard was surrounded by tall fence that kept any prying eyes out which Grayson was eternally grateful for as it led to Amaya sunbathing everyday for the past week, right at 10 AM. She was back from her first year at college, freshly 19, while Grayson had already graduated at 24. She had cycled through all her bikinis, from a green one with strings wrapping around her body to a red one that disappeared into her bubble butt. However, the black one she was wearing today made his eyes pop. The bottoms were fairly modest, but the top was a push up that smushed her C cup tits together. He lowered his boxers and grasped onto his morning wood with his already lotioned up hand.
Their parents had left for a two week cruise to Mexico and the same day Amaya was out there by the pool, soaking up the sun. On the first day, Grayson just took a peek every now and then, a little afraid to get caught. But by the fourth day he was unabashedly stroking his cock, too horny to care. She was always facing away from his window which allowed him to stare all he wanted. His favorite part was when she turned over and untied the strings on her back, her cute butt and naked back on display. He noticed Amaya pick up her phone and a couple seconds later his phone lit up with a text from her.
"Can you pleaseeeee grab me a lemonade from the fridge?"
A little peeved at the interruption, he quickly put his boxers back on and threw on a pair of shorts and shirt, tucking his boner into his waistband and headed down the stairs, hoping it wouldn't be noticeable by the time he got outside. Trying to avoid openly looking at his sister, he walked towards her looking at the sky with the lemonade stretched out.
"Here you go Amaya"
"Thank youuu", she replied, absent mindedly reaching out her hand without looking and made contact with Grayson's bulge, still a little chubby from his session earlier.
Grayson jumped at the touch, spilling a little bit of lemonade, but he was more surprised that Amaya had no reaction to it. Thinking that there was no way she didn't notice what she just touched, he walked back inside and decided to start making breakfast like he usually did. He thought it would be too suspicious to stay in his room with his sister already knowing he was up.
As he was setting a stack of pancakes on the table, Amaya rushed back inside and yelled,
"I forgot that I was meeting Kiera at the mall today, I'm late!"
Grayson yelled back a reply but was more focused on her ass, jiggling as she bounded up the stairs. His erection started to come back and planned on using the time she was gone to finish what he started in his room.
After finishing his pancakes and seeing Amaya rush out in a tight pair of jean shorts and a yellow crop top that showed off ample cleavage and toned midriff, Grayson waited a couple minutes to make sure she wasn't coming back. He was walking back to his room when he noticed Amaya's bedroom door open and the black bikini he just saw her in laying there.
"She must've been in too much of a hurry to put it away" he thought, growing harder as he went to pick them up. He held the bottoms with two hands and gingerly sniffed at it, smelling a slightly sweet and musky aroma. Overcome by his horniness, he brought up the part where her pussy would've been up to his nose and deeply inhaled. Though the smell wasn't too strong as she had barely worn it, his cock was rock hard at the thought of where these had been just thirty minutes ago. He wrapped it around his member, the tip touching where he just smelled and started stroking, his other hand reaching for the top. He smelled that too, though there was even less smell coming from it. He grabbed the bikini cups and imagined he was grabbing onto Amaya's tits, softly pinching where her nipples would be. The image of his sister in the morning came to mind and he could feel an urge coming from his balls. He was so turned on that he lasted much less time than normal. Still in the hallway without the tissue box that was next to his bed and not wanting to have to clean the carpet, he held the bikini cup in front of his cock and stroked faster.
"Oh fuck"
He spasmed a little as white gobs of cum shot from this cock into the bikini top, groaning in pleasure as he filled it up. Despite it being a C-cup bikini, his sperm was almost overflowing and he had to be careful walking it to the bathroom to clean. Washing his sister's bikini in his post nut clarity haze made him feel a little ashamed, but figured as long she never found out then it would just be his own innocent little thing. After wringing out the water, he put the bikini back as he found it in her room.
About to leave, he noticed her drawers open and glanced inside the top one. Panties of all colors greeted his eyes and his deflated cock gave a little twitch. He gingerly picked a pair up and spread it out. It was just a regular pair of pink cotton panties, but it still got his rod to start to perk up. Giving it a quick sniff, he decided to come back for them another time, when he was fully recharged.
Next Day
Grayson woke up again to his ringing alarm, excited to see what color his sister was wearing today. He poked his head up the window and was surprised to find Amaya facing the house now instead of her usual spot near the deep end looking towards the fence. He quickly ducked back down, afraid to get caught peeping. Instead, he put on his swim trunks and headed out to the pool.
"Cannonball!"
