Although Rob couldn't see his sister through the blinds of Scott's office, he knew what she was doing in there. There was almost no sound outside in the pre-dawn chill of the morning, and from his vantage point in the pooled shadows behind the auto shop, Rob could hear the cries of the three people inside.
It seemed Amy had some mischief of her own going on.
After Rob's brief conversation with her the night before, Rob had watched Amy closely. He'd followed her from the house to the auto shop, sticking to the shadows, being as quiet as he could. She hadn't spotted him, and he'd waited across the street until Scott's car parked out front. At that point, he'd already put it all together.
Amy was fucking Scott behind her mother's back.
Not only that, but they'd brought another girl in already — Sadie, Scott's young secretary or office gopher or whatever. The thought left him stunned and aroused in equal measure. Apparently their mother had put Amy on the fast track to complete depravity.
Rob felt a pang of jealousy — three women in the last week alone, a mother, a daughter, and the daughter's hot best friend. What the fuck had that guy Scott done to deserve such a bounty?
In the dark, Rob was determined to get some of those riches for himself before it was all over. He could play the depravity game, too.
The cries inside the office reached a crescendo. Rob hadn't yet risked trying to peek through the tiny gap in the blinds — he was terrified of getting caught — but the sounds inside were too enticing to resist. Standing on his tiptoes, he craned his neck to look inside.
Through the narrow slit of light between the blinds and the window sill, Rob saw the three of them in the office — all completely naked, their bodies gleaming with sweat. His sister was on her knees, her elbows propped on the leather couch, while Scott fucked her from behind. Sadie knelt next to him, one hand on Amy's bare hip, the other clutching Amy's hair, holding her in place so Scott could have his way with her.
Rob watched his sister, fascinated. Always expressive, her face displayed every emotion that crossed it; pleasure, disbelief, a hint of sweet humiliation. Rob felt his erection press against his jeans, and himself felt a faint pang of shame. He wasn't sure why — he'd already seen his mother naked only the day before, a situation he'd deliberately orchestrated. Feeling ashamed at this point felt like closing the barn door long after the horses were gone.
But still, it was his little sister.
Amy suddenly stiffened, letting out a series of loud, hitching gasps that ended in a sound much like a sob. Rob suspected she had just come. Scott, who from the sound of things had come at least once or twice already, slowed his thrusts, drawing a few more moans from Amy before pulling out of her. Amy collapsed limply to the couch, while Sadie pressed her lips to Scott's in a passionate kiss.
Scott sat down on the couch, and Sadie crawled into his lap, drawing her bare knees up under her and draping herself across his chest. The three of them began to chat, with elated looks, on what had just happened.
Rob couldn't hear what they were saying through the window, and the sudden intimacy of it bothered Rob. He crept away from the window, shifting his erection in his jeans, and began the long walk back home.
The morning air would do him good. He'd have time to think about how he was going to use this new information. With a little finesse, in a day or so he'd be completely in charge of this demented game his mother had started.
# # #
The sun was up when Rob got home. He laid down on the couch and waited for Amy to arrive. After about twenty minutes, he heard the back door open, heard her pad quietly to her room. A few minutes later, she crossed the downstairs hall to the bathroom, and he heard the shower start running. It wouldn't do to come home smelling like sex with her mother's boyfriend, Rob figured.
Amy must have been tired or distracted or both, because not only did she neglect to lock the door, but she didn't even close it all the way. Rob lay in in the dark, biding his time for a few minutes, and then got up and walked to the bathroom.
He slipped through the open door and watched his sister's naked form through the translucent shower curtain. He couldn't see much, but then he'd already seen Amy about as raw and vulnerable as anyone was ever likely to. Rob leaned against the counter and enjoyed the sight all the same.
The shower stopped, and Amy stepped out. Her eyes bulged when she spotted him. She squeaked and reached for the bath towel, clutching it to her wet body. Rob saw a glimpse of taut, pale flesh before she hid it away.
"Rob! What the fuck, get out of here!" Her voice cracked with dismay, the way it had when they were both young and he'd tease her by taking away one of her dolls.
"Sorry," he said with a smile. "The door was unlocked."
"Get the fuck out of here!" she said. "I'll tell Mom."
"I don't think you will," Rob said. "I know where you went this morning, Amy."
He wouldn't have thought it possible, but Amy went even paler. The color drained from her cheeks, and she stepped out of the tub, dripping. "What are you talking about?"
"I followed you to the auto shop," Rob said casually. "I saw your little threesome with Sadie and Sc—"
Amy lunged at him. For a moment he thought she was going to attack him, but instead she slammed the bathroom door shut.
"Keep your voice down," she whispered fiercely. "Mom will hear." From this angle, Rob could see the naked curve of her waist and hip. She caught him admiring it and flinched back, still clutching the towel to her chest.
"Mom's still asleep," he said. "She won't hear a thing... at least not right now."
He watched as Amy's face fell. Her expression was like a rabbit caught in a snare. "Rob, please don't tell Mom about this. She'll freak out."
"I'm sure she would," Rob said. "She's freaking out already. See, she told me how she set you up, how you and her and Scott all got together and had your nasty little incestuous tryst."
"Ugh, shut up," Amy said. "It wasn't like that."
"What was it like?"
She glared at him. "You wouldn't understand. You make it sound all seedy and horrible."
"It is seedy and horrible. And you made it even seedier by fucking Scott behind Mom's back."
Seeing that he wasn't going to budge, Amy let some of the tension in her body release. Slowly, she began to dry her shoulders and neck with the towel, giving Rob more glimpses of her flesh.
"She started it," Amy said. "It wasn't my idea, it was hers."
"That's bullshit," Rob said. "It was your idea, she just made it happen after she found out about it."
Amy looked at the floor with a guilty expression. "Look, please just don't tell her, okay? Yeah, it's screwed up and weird, but Mom likes Scott, I don't want them to break up."
Rob laughed. "Well, isn't that considerate of you."
"Shut up."
Rob licked his lips. "I won't tell her. If you do something for me."
Amy froze in place, her wet hair falling around her face. "Oh, God," she said.
"Don't worry, it's not that." Not yet, he thought.
"Then what?"
"You're going to break up with Ian."
Amy furrowed her brow. "Why?"
