Katie had never met anyone like her oldest sister's latest boyfriend John before. At first, she had been a bit freaked out that her 23-year-old sister Julie was dating a guy over 10 years older than her, but then she had met him. Wow! It wasn't that he was an absolute hunk (although Katie thought he was quite fit!) He just had a certain presence about him -- an aura if you will -- that made Katie go weak at the knees.
Julie too seemed smitten by John. Katie always thought her sister was a bit of a bitch, but she just seemed different around John. Respectful somehow. She seemed to hang on his every word and, every time Katie had met him, she too was drawn under his spell.
Katie found herself more and more in her own room fantasising about John as she played with her increasingly wet pussy. How he would kiss her. How he would take her ... use her ...... make her his slut.
Katie gave her head a shake. Since her friend Emma had introduced her to the world of erotic literature and adult chat rooms, Katie realised she was spending too much time in them. She was no-one's slut! Heck, she had barely done more than kissed her boyfriend. She had slapped him away when he had tried to feel up her developing breasts. John was her sister's boyfriend, he was way too old for her and even if he wasn't, Katie, at 19, was way too young for him. John probably just saw her as a little girl. She really needed to stop these stupid fantasies.
Sometimes though she could swear he was looking at her with desire, undressing her with his eyes. Katie let her imagination run away with her as she pictured John sneaking into her room when Julie was asleep and climbing into bed with her, pressing his hard cock into her teenage pussy and filling her up. Her fingers pumping into her pussy as she imagined him thrusting in and out of her hungry sex, grasping her long black hair as he fucked her hard. "I must stop this," she thought. "Tomorrow. Maybe......"
The day that changed her relationship with both John and her sister started off fairly normal with lectures at her college. As it got towards lunch, she discovered two of her lecturers were ill, so she had a free afternoon. She was a bit disappointed as she had a crush on one of the older male lecturers but was also happy to be able to head home with the house to herself.
As Katie got home, she realised that her sister and John were there. Nothing could have prepared her for seeing them both on the sofa in the lounge. Or at least, John was sat on the sofa in a smart shirt and trousers whilst Julie was sat at his feet on the floor in a very lacy black bra and pants. Katie had never seen her sister look sexier. She knew she should make a hasty retreat, but instead stood rooted to the spot as Julie ran her head up John's leg.
It was only when Julie started to unzip John's pants that Katie let out an involuntary gasp and both John and Jule realised she was there.
Julie turned bright red, but John seemed unfazed as he held Julie still.
"Hello kitten," he smiled as he looked at Katie. He had started calling Katie that a few months into his relationship with Julie, and Katie quite liked it for some reason she didn't really understand.
"Sorry... I should go....." stammered Katie as she got over her shock of being discovered.
"No, stay," said John. Katie wanted to run away, but her body couldn't move as she watched the sight before her.
"Keep going, baby," John said, turning his attention back to Julie. Slowly, shyly, Julie unzipped her boyfriend and extracted his hard cock. Katie gasped as she looked at the biggest cock she had ever seen in real life. Ok, it was the only cock she had seen in real life, but she had seen pictures. Julie started licking up and down John's throbbing shaft as he turned again to Katie.
"Come and sit with us, Kitten," John instructed Katie. She felt as if she was having an out of body experience as she went to sit by John. Meanwhile, Julie had shifted to her knees and was slowly engulfing the head of John's cock between her lips.
"Your sister is such a good girl!" commented John as Julie gradually sucked more of his throbbing knob into her mouth. Katie couldn't tear her eyes away as her sister bobbed up and down on the glistening shaft.
"I think you are a good girl too, kitten," whispered John as he reached out and pulled Katie closer. She didn't resist as he began unbuttoning her top and exposing her C cup breasts.
"I always thought you had nice tits," John commented as he discarded Katie's top and undid her bra. Julie meanwhile was happily sinking down on John's stiff erection, opened up her throat to take all of him as he had taught her.
Katie closed her eyes as John twisted one of her nipples in his hand and leaned over to kiss her. She felt herself groaning as he bent down to suck one of her tits into his hot mouth. Katie looked down at her sister, swallowing John's mammoth cock into her hungry mouth. "God, I must be dreaming," thought Katie as John continued to play with her boobs.
"Coming," cried John as he exploded in Julie's mouth. Katie could only watch in wonder as Julie kept sucking on him as he came.
"Kiss your sister," John said to Julie as she finally let his cock slip from her mouth. Before Katie had a chance to realise what was happening, Julie was up and locking her in a kiss. Julie forced Katie's mouth open with her tongue and began pushing John's cum into her younger sister's mouth. Without thinking, Katie found herself responding to Julie and kissing her back hungrily, passionately. Julie's hands went to her tits and the she started kissing down to suck a breast into her mouth just as John had moments earlier.
Katie freaked out with her sister's attentions, shooting up to flee the room. She glanced back to see Julie rising to sit on John's hard erection as he looked straight at Katie. Somehow, someway, Katie knew that he was going to have her. Katie ran to her room, threw off her clothes and masturbated herself to the most intense orgasm of her young life.
The next few days, Julie and Katie avoided each other, and Katie didn't catch sight of John. She was so embarrassed. What had happened? She was convinced that she had imagined the look from John and nothing more was going to happen.
It was Friday evening, their parents away for the weekend, when Julie finally appeared in Katie's room.
"I think we need to talk about the other day," started Julie.
"We really don't!" responded Katie, turning red.
"We do," said Julie calmly, sitting on Katie's bed.
