"Huff huff!"
"Ohh..."
Greg blinked away the sleep as he opened his bedroom door and stumbled out in his underwear. What was the noise that had woken him up? The 18-year-old high school student shuffled into the main area of the house and tilted his head to peer into the kitchen. He stifled a gasp upon seeing his stepmother bent over one of the kitchen chairs, naked, getting fucked from behind in the gloom of night.
"Ohh!" she moaned again as she pushed back at her lover.
"Huh! Huh!"
Greg angled his head a little more, as those grunts didn't sound like his stepfather, and his eyes widened as he saw his brother Julian pounding into the older woman. Greg didn't move...he realized that his vantage point was safe, as the fucking couple was sideways to him...Diana, their stepmother, had her eyes closed and Julian was only paying attention to the sexy lady as he sawed his cock into her.
Julian reached forward to grab her breasts. They weren't huge but neither were they small. Greg had no eye for cup sizes, so had no idea that they were a B-cup.
"Mm! MHM!" the woman moaned as her body shook in pleasure.
"Shit!" Julian hissed as he pulled out, turned his naked ass toward his hidden brother, and then pushed the woman down to her knees to shove his cock into her mouth. "Ugh! UHH!"
"Mmm..." Diana moaned as she swallowed her stepson's load.
Finally, Julian pulled back and helped her to her feet. "That was great, Mom...you head back to bed now, okay?"
"Mhm."
Greg froze. Diana was coming right toward him now...there was no way that she wouldn't notice him, except...she didn't. She walked right by him on her way to the stairwell that would take her to the second-floor bedroom she shared with her husband, her eyes open but apparently unseeing. Julian had left the kitchen by the far entryway, closest to his own bedroom, and that door was already closing.
Greg watched the plush ass of his stepmother as she ascended the stairs. He'd never really thought of the brunette as sexy, given that she'd been a mother figure to him for over ten years now, but he was literally seeing her in a new light.
But why hadn't she noticed him? Shaking his head, Greg noticed that his cock was hard and went back to his room to take care of it with the new and confusing 'spank bank' material he'd just witnessed.
---
Greg and Julian, unrelated but friends in the orphanage, had been adopted at age six, twelve years ago, by Diana's husband Connor and his then-wife, as it seemed that the couple couldn't have children. Their adoptive mother had died in a car crash only a year later. Connor had done his best to be a single dad but was woefully ill-equipped, so had hired a nanny, Diana, who was only twenty years old at the time. One thing led to another and the adults grew together, finally getting married and making her the boys' stepmother. She'd already taken care of them for a couple years by that point, so it was an easy transition. She was currently just over thirty years old to her husband's forty.
Greg hadn't gelled with Diana in the same way Julian had, the other boy just happy to have a mother figure in his life. Greg was a solitary kid, mostly keeping to himself, though happy that his 'brother' was taken care of.
Well, he'd certainly been 'taken care of' last night, Greg mused as he woke the next morning. How long had that been going on, he wondered?
At breakfast, Greg noticed that Julian was very attentive to Diana, asking her if she needed help or taking care of the dishes without being asked...if Greg hadn't stumbled upon them last night he probably wouldn't even have noticed, but now it was obvious that the young man was smitten. Diana, however, seemed oblivious, as did her husband.
---
Greg had noted the time that he'd been woken up the previous night and set a vibrating alarm on his phone for fifteen minutes prior to that. When it went off, he slipped out of his bed and opened his door a little. Sure enough, he could make out two figures in the twilight of the living room.
"C'mon, Mom, sit down," Julian directed his naked stepmother onto the edge of the couch cushions before he brought his face between her legs.
"Ohh..." she sighed and lay back as her stepson licked at her pussy. After a few minutes of her continually moaning, he stood up, pulled down his underwear, and lined his hard member up with her glistening hole. "Uhhm..." she groaned as her stepson's cock slipped into her wet channel.
Greg was still angling his head out of his bedroom door, unnoticed because Julian was facing away. Diana, however, would have seen her other stepson if she'd been in her right mind. Greg had done some internet research and figured out that she must have been sleepwalking and his brother had taken advantage of that at some point. Their stepmother had trouble sleeping and had started a new medication a few weeks ago, so that might have been the start of all this.
"Uh! Uh! Uh!" Diana grunted as Julian thrust into her from above.
Greg pulled out his cock and stroked it as he watched the incestuous incident.
After a few minutes of furious fucking, Julian pulled out, stepped up beside her on the couch, and dipped his cock into her mouth to finish again. "Unh! Yeah..." he moaned as the older woman gulped it down.
Greg had almost cum but stopped when his brother did. He watched as Julian pulled his stepmother to her feet, directed her back upstairs, and then returned to his bedroom on the far side of the common area, not even looking back.
Diana had to pass close to Greg's bedroom to reach the stairs so he stepped out, took her hand, and turned her toward him. "Mom?" he whispered.
She just stared forward, unseeing.
He touched her cheek. "Mom, can you hear me? Ohh..." He looked down...she had taken a hold of his hard cock, which had slipped out of his underwear, and was stroking it. "Oh wow...um...Mom, it's Greg. Ohh..."
Unbidden, the sexy brunette dropped to her knees and engulfed her other stepson's cock with her hot mouth. It only took another thirty seconds before he filled her tummy with another batch of hot, incestuous sperm.
He helped her to her feet and scanned her body in the gloom. She was beautiful, maybe 5'8", with shoulder-length dark hair, gray eyes, a trimmed 'landing strip' of pubic hair between her legs, and perky breasts topped with hard, pointy nipples. He really wanted to grab them, but this was already too weird. "Mom, go to bed."
She turned and headed up the stairs.
