It started because Sam was thirsty. He had been up late at night, walking blearily to the kitchen for a glass of water - his throat was parched - when he noticed that the door to Susan's bedroom was ajar, a stream of dull lighting cutting a shard of light across the otherwise pitch dark hallway.
He had only meant to shut the door quietly, thinking that his 18 year old stepdaughter must've fallen asleep before switching off her light and shutting the door. However, his whole body stiffened when he took a glance into her bedroom, his mind losing all semblance of thought as his mind tried to process what he was seeing.
Susan was completely nude except for a pair of tight pink panties, stretched out like a cat on top of her pale pink covers. Her agile body was lithe and petite, squirming back and form with her hands rubbing in between her legs. She was masturbating - not very quietly, either, small girlish moans reaching his shocked ears as he took in the sight.
Sam wouldn't lie. He had imagined his stepdaughter nude many a time, like when she reached over to pour him a cup of coffee and accidentally revealed to him the soft, large mounds of her breasts that pressed too tightly against her loose t shirt. He'd tried to shove those thoughts away but she was an attractive young woman and now - with her beautiful naked body writhing with pleasure as she rubbed her wet pussy - no one could blame him for enjoying the show, could they?
Her breasts were big for her age, round and heavy, her nipples flushed and as stiff as pebbles. Her thighs were spread open and her hand was down the front of her panties, rubbing furiously as her mouth hung open in a quiet expression of pleasure. Sam could see the glisten of her wetness coat the inside of her spread thighs as she rubbed her clit. He watched as her other hand came up to play with her tits, pinching and rolling her nipple between her fingers. A fresh moan breaks past her lips as she grinds upwards into her hand in a sensual, smooth motion.
Sam's mind starts wandering.
God, what he'd do to be able to reach towards her and squeeze her breasts, feel her soft flesh beneath his palms as he rubbed his palms over her stiff pink nipples. He'd reach down and spread her legs to look at the outline of her pussy against her pink underwear. Maybe she'd raise her hips against him in arousal, begging with her large doe eyes for him to touch her pussy. He'd trace the covered mound of her tight pussy, feeling her slowly get wet beneath her tight pink panties.... Touch me, daddy, Susan would pout, and spread her legs wider to allow her stepfather to feel just how wet he made her. Take off my panties and touch me..
He'd tease her a bit, tracing her clothed pussy until her cute little panties were absolutely drenched and she was writhing and mewling with desperation. Only then would he slowly slide her sopping panties off her, revealing to him her wet, naked pussy, begging for his fingers or cock to slip right into her...
He shifted to his other foot, aware of how hard his cock was, straining against the front of his pants. His movements cause the floorboards beneath him to creak loudly, alerting his stepdaughter of his presence. Shit.
Susan sat up with a gasp, her cheeks flushed pink with embarrassment and her soft, pink lips hanging open in shock.
"S-Sam!" she hissed, "I didn't know you were there.."
He sighs - he's ashamed, of course, but he knows there's an opportunity here.
Sam steps into the room. He watches as his stepdaughter's eyes roam down his body to settle on his very obvious erection pressing prominently against the front of his pants.
"That's not a very good girl thing of you to be doing, is it?" Sam asks quietly, "what do you think your mum would say if she knew what you were doing?"
Susan opens and closes her mouth in desperation, her large bright eyes begging him.
"Please, Sam.." she says desperately, "don't tell mum, she'd be so mad with me-"
"Shh, of course I won't tell," Sam says, sitting down next to her. From this close Sam could really take in the beauty of his stepdaughter's body. Her smooth skin and sensual curves. Her fingers still wet from playing with her tight pussy.
"Masturbating's completely normal. It must be hard for you, hm? Your mother doesn't let any boys come over. I'm sure you have needs."
She nods slowly, calming down as she realises he wasn't mad at her.
"Why don't I help you out? It'll feel much better."
Sam knows that his stepdaughter is attracted to him. It came in lingering stares that rested on him too long, small blushes that flushed across her cute face whenever he spoke to her too close. He knew she wouldn't say no.
"But.. but, my mum-"
"She doesn't need to know, hm?"
Sam rests his hand on Susan's smooth thigh, slowly running his palm up her warm, flushed skin. Susan's mouth hangs slightly open at his touch and she bites down on her puffy lip.
"Let me help you," Sam whispers. His fingers are now at her inner thighs. He could feel her wetness on his fingertips as he teasingly danced his touch over the edge of her panties, skirting the edge of her wet pussy. Susan unconsciously spreads her legs wider for him, as if she was already begging for more. Her nipples were stiff and he longed to reach down and suck on them, swirling his tongue around those sensitive nubs and hearing her moan for him.
