Tyler arrived home at two-thirty in the afternoon feeling horny. His parents and older half-sister weren't due home for another three hours, making it the perfect time for getting his rocks off viewing hot naked women sucking and fucking their way through multiple partners on the adult movie channel.
The movies only got him started. Tyler's fantasies soon drifted to his half-sister. Anna was a hot-looking twenty-year-old with long near-black hair, intense blue eyes, full lips, taut round ass, and perfect 38D tits.
Dreams about her both disturbed and excited Tyler; part of him knew seeing Anna in a sexual manner was wrong even though she was only a half-sister while the other part yearned to have her.
He stopped mid-stroke after hearing a noise from upstairs. No one should be home yet, he thought while hearing gasps and moans coming from his parent's room.
Tyler yanked up his jeans and crept upstairs until reaching the noise's source. Something made him peer inside the ajar door and thought he saw Anna on the bed. He opened the door a little more and to his surprise, found one of his father's friends with Anna, both of them naked!
He stood out of sight and watched as George rubbed his cock up and down the slit of Anna's bald mound, teasing her until she begged him to stop.
"So tight," George moaned as he entered her. "Your pussy is so tight."
He began fucking Anna with slow strokes, kissing and sucking her soft, creamy breasts. Tiny squeals of delight escaped her lips as he increased the pace of his thrusts.
"God yes!" she moaned. "Fuck me harder!"
"Feel good?" George asked, not missing a beat. "You like taking my cock, baby?"
"Yessss. I've been so horny..."
Tyler was amazed he was watching the two of them have sex. Tyler dropped his jeans and underwear and placed one hand around his hard cock. He slowly rubbed the shaft, his eyes remaining fixated on Anna's bouncing tits while George continued slamming in and out of her for several minutes.
Tyler stared with mouth agape as George suddenly pulled out, flipped Anna onto her stomach, and buried his face in her shapely bum. George began eating her with fervor, his slick tongue working its way front to back. He buried his face deeper and increased the intensity for several minutes until Anna cried out in orgasm.
"You've got a beautiful ass, baby," he said huskily when he finished.
Anna remained on her stomach as George's cock slid up and down her crack. He kissed and sucked her neck before he again sank his entire shaft into her pussy.
"Ohhhh, George," Anna breathed. "Go deeper."
George slapped her bottom and increased his thrusts. "Anna, Anna, you're so sexy...so dirty...so slutty...the hottest fuck I've ever had. I can't get enough of you."
"Mmmmm... I love your big cock. I'll give you all the pussy and ass your wife doesn't."
Anna moaned as George's ass cheeks clenched and released while he fucked her from behind. George kept talking, but Tyler was so lost in fantasy and stroking his own cock that he couldn't make out any additional words.
The aura of illicit intercourse overtook Tyler's senses: Anna's increased moans turning into cries, George's grunts of pleasure, the bed squeaking in time with George's increased thrusts, the scent of raw sex making its way out of the room and curling under Tyler's nose.
George let out a yell, jarring Tyler from his thoughts. "Fuck, Anna, I'm going to come!"
"Yes!" she wailed. "I want all your cum in me now!"
Panting, George soon finished and held his cock inside her for a few moments. He kissed Anna's back before he gently pulled out and fell onto his back, satisfied.
"Thanks, baby," he said breathlessly. "That was amazing."
She giggled. "At least we finished long before Mom, Mac, and Tyler came home."
George caressed one of her tits. "Yeah, I don't think Mac would've appreciated me fucking his stepdaughter."
Anna sat up and handed him his clothes. "Which in that case, you better get dressed and leave before we DO get caught."
*****
Tyler found his way down the hall to the bathroom to clean up his cum-covered hand and cock. He washed at the sink, not noticing the open door until he heard Anna - now wearing a robe covering her nakedness - gasp as the sight of Tyler cleaning up the end result of masturbating while watching her and George.
"Tyler, what the hell are you doing home so early? Moreover, why are you doing jacking off in here?"
"Well...I...uh..."
"Well what?" Her eyes then widened. "Oh my God, you saw me with George!"
"Anna, I..."
"You dirty pervert! I swear if you say one word to Mom or Mac about this-"
An idea crossed Tyler's mind and he smiled knowingly. "Don't worry; your secret's safe with me...on one condition."
"What?"
"They aren't due home for a while yet, so since you enjoyed spreading your legs for George, maybe you could spare me some action."
