Trucker who leaves good tip get tits.
odd thoughts - she needed to forget all about this as she'd be sharing Hannah's spare bed with Natalie in an hour or two!
Hours later, Penny woke up. She'd always been a light sleeper, and slept even less well in unfamiliar surrounds. The clock-radio told her it was a little after 5am. Rolling over, she found herself looking again at Natalie. It was warm in the house, but modesty had led both girls to sleeping in flannel pyjama bottoms and tank tops. The pre-dawn light in the room was enough for Penny to see that Natalie had thrown back the duvet in the night. The younger girl was laying on her back, legs twisted towards her step-sister, with her head on one side. Her deep, even breaths made her big boobs rise and fall as she slept soundly. She seemed to be dreaming, though, as Penny watched her. Natalie was frowning in her sleep, and stirring gently.
Almost without conscious thought, Penny reached out with her left hand and carefully, almost imperceptibly, cupped Natalie's right breast. She left her hand still, to see if Nat would stir further, but when she didn't she slowly grazed her palm and fingers over her younger step-sister's chest, feeling the swell of the big breasts beneath the thin fabric of Natalie's top. As Natalie remained sleeping, Penny grew bolder, softly cupping and stroking the big, soft tits. Natalie's nipples began to respond, stiffening in the tight top, raising two hard points in the material. Penny assumed this was involuntary and continued to gently fondle her step-sister's boobs with her left hand, whilst her right slipped under the waistband of her pyjamas and began to stroke her own sopping pussy. She was scandalised and terrified almost as much as she was excited by how wet she was, somehow more turned on by this almost incestuous lesbianism than she ever had been by a boy.
Penny rubbed herself off in no time at all, turning her face into her pillow to stifle her moans as she came, and making sure that she didn't clutch at Natalie's breasts in her excitement and accidentally wake the younger girl.
No sooner had she come than she was washed with guilt. What had she done? What was she thinking? Bringing herself off whilst groping her younger step-sister? A girl she'd known when they were both at first school! Fuck! But all the guilt could not change the fact that Penny's pussy was still tingling and her own, pink nipples were painfully erect on her perky breasts. Carefully rolling onto her back, Penny dozed off into a fitful sleep, troubled with dreams, equally sexy and guilty.
For her part, Natalie kept her eyes closed and lay still until she was certain the dark-haired girl she considered a sister was definitely asleep. It had taken all her self-control not to open her eyes when she'd been awoken by Penny's obviously intentional stroking of her boobs, never mind when she'd heard the clear sounds of a pussy being rubbed and the muffled sounds of Penny's orgasm. Once Penny's breathing had become slow and deep, however, Natalie opened her large, green eyes and looked with clear lust at Penny. As the youngest, Natalie was seen by her sisters as the child of the family, and they presumed a degree of innocence on her part that had not been there for a good few years. She still played the part of cheery klutz at home, as was her defined family role, but once away from her family, Natalie had an altogether different reputation.
As soon as her breasts had turned from promising to staggering not long after she turned 16, all the boys and some of the girls in school had wanted a piece of Natalie, and she discovered quickly that she was delighted to give them some! Unbeknownst to her two elder step-sisters, who themselves had not been shy around sex, Natalie had been fucked by more men by the time she was 18 than Penny and Hannah had by now.