Note: Everyone involved is 18 or over in this story.
----
Ch. 02 -- The challenge
Fifteen minutes after blowing what possibly was the most satisfying load of his life, Jason was standing in the large shower room on the third floor of the house. It was a part of the spacious bathroom that was only accessible from their mother's personal bedchamber, with glass door, marble walls, stone tile floor. The place was large enough for a maximum of six people to take their ease and comfortably have a wild orgy inside while the large luxury high-flow showerhead rained down a soothing stream upon them.
Jason rarely had to masturbate to relief himself, being a god stud who could get any girl he wanted. Though he remembered his first time doing it, and it was while watching his mother being challenged for the first time in a very long time by the former number one pornstar in the world before his mother dethroned him in that same epic sex battle. They had fucked each other so hard that they literally trashed the entire house, before eventually the man had to give for the sex addicted nympho, who continued to fuck him until he was her bitch and needed a three-month recovery before he could return to work.
Nonetheless, Jason was having an irresistible urge to just grab his dick and give it a stroke to masturbate but his pride would not allow him to, as he stood there and watched as his sister stood in front of him under the shower and washed her body in an extremely sexual manner. She was having her back to him, so Jason was having a very nice view of the deadly curves of her backside, from her seemingly arching back down to her round, bubble buttocks that were nothing but perfection. He was enjoying the way her wet, flawless creamy white skin was glistening erotically under the light, and the way she was sensually moving and swaying her body was just driving him nuts. She was obviously doing all that on purpose, but who was he to complain?
"Did you suck up all my cum before coming in here, sis?" Seeing that she had almost finished her cleaning, Jason decided to make his move, sounding as casual as he possibly could as he finally threw his arm on Amber's shoulder and reached over to grope at her right breast, using it to pull toward him. His sister barely reacted to it, only reached one hand behind to stroke at his cock as she tilted her head to the side to smile tauntingly at him.
"What do you think?" Amber asked, "I must say, little brother, your cum isn't half bad."
"You love it, sis. Admit it." Jason told her, leaning his hand down to kiss at her neck as his hand kneaded at her tit with greed borderline obsession. "How many minutes did it take for you to clean up all that cum that I dumped on you, sis? Five?"
"Two, actually... that's why you will have to do better than that to impress me, Jase." Amber slurred seductively, reaching her hand up to tap playfully at his nose, a rather sisterly gesture that would have looked wholesome if they weren't both naked, and weren't molesting each other in such a sexual manner.
"Oh, you can trust that I can do a whole lot better." Jason replied to her, smirking as he reached down with his other hand and cupped her pouty cunt lips, making her moan out when he inserted his middle and ring fingers inside "I can show you right now, if you want."
"Remember, Jase, no sex before our 20th birthday." Amber reminded him with their mother's words, her hand furiously stroking his dong as it oozed a ridiculous amount of precome on her back, trailing heavily down her ass before being washed away by the hot water pouring down their bodies from above. "Plus, it's best that you save your strength. Don't want you to put yourself at a disadvantage coming into my challenge for you. I want it to play out fair."
"How thoughtful of you, sister." Jason commented and Amber responded by rubbing her ass against his cock, turning it from side to side before she made it clasp around the stiff rod, causing Jason to grunt in response as he asked "So when is this challenge of mine going to take place?"
"After lunch. I will drive you to the location and that's all you need to know. Don't want to spoil the surprise, you see." Amber answered, adding the last sentence before she separated herself from him and walked out of the shower room without saying any other word, leaving him standing there with a raging erection that was so hard it's actually making him a little uncomfortable.
Growling in discomfort, Jason had no choice but to turn the shower to a cold setting, hoping to calm his lurching cock down a little. Whatever or whoever that she had in store for him this afternoon, they were in for a sexual annihilation.
XXXXX
It was two in the afternoon that Jason found himself sitting idly in the passenger seat of his sister's personal vehicle, a dark silver convertible Aston Martin DB11, allowing her to drive him to the location of his challenge.
Jason had no idea where they were going, but Amber was dressed in an extremely provocative outfit, her top being a black corset that was so small it looked like a pair of leathers being held on her chest by number of thin, crisscrossing threads that were hovering in the air due to how far her breasts were pushing them out. Her bottom was a form fitting miniskirt that matched the corset in design, looking very much like a belt as it fanned over her fat like a second skin, leaving her smooth, toned thighs exposed with a pair of black stockings and matching heels covering the rest of her mile long, sexy legs.
Overall, Amber looked like someone who was heading to a strip club, while Jason was a bit more casual, his outfit being a simple white T-shirt and black gym shorts.