Sixteen year old Tina was a well known loud mouthed trouble maker who caused a lot of trouble, she did not have many friends, people did not want to mix with her and would rather avoid her if they could that way they felt safer from her. Mark who was two years younger than what Tina was also did not have many friends due to him being a flasher like Tina he was on his own most of the time, his granddad was the care taker of the local school and Mark visited him as often as he could and had arrived to see his granddad just after the school had closed, Mark was watching the lights go off in each room as his granddad did his nightly security check, Mark saw the lights in the changing room go off then a couple of minutes after going off the lights went back on after they did not go back off Mark walked over to the changing room and seeing a small window open looked through it, when he did he saw Jane who was four years younger than Tina and her sister, she was taking her jumper off, Mark had always thought that liker her older sister Jane was very good looking, as Mark watched her Jane stripped naked, Mark could not believe his eyes as he looked at as he looked at Jane’s smooth love tube and just starting to develop boobs and when she turned round and walked to the benches Mark stared at her cute bum and watched as she lay down on the bench draping one leg over each side of the bench , Mark was now looking at Jane’s open love tube and when she started to rub it Mark thought cool I wonder if she wants me to go and help her, after a few minutes Mark saw Jane insert two fingers into her love tube and start to masturbate, Mark watched in Awe thinking I wonder if she wants to swap fingers with me and carried on watching after after five minutes when Jane arched her back and gushed Mark thought very nice after a few minutes Jane washed her hands then dressed and left the changing room, Mark was about to go back and wait for his granddad when the changing room door opened and Tina walked in, To Marks surprise Tina started to undress and after a couple of minutes was naked, Mark looked at her firm boobs that had erect nipples and her shaved love tube and admired her bum when she walked to the bench and lay on it draping her legs either side like Jane had done then started to rub her love tube, Mark thought I must be dreaming as Tina pushed her fingers into her love tube and started to masturbate then after ten minutes arched her back and climaxed then not long after washed her hands dressed and left the changing room switching off the lights as she went, Mark went back to wait for his granddad not believing he had just watched the two naked sisters masturbate while naked. As Tina and Jane walked down the road on their way home Jane said ” do you think he watched us ” Tina replied ” yes he did I saw him watching ” then when her sister said ” do you think he will fuck us ” Tina smiled at her sister and said to her ” oh he will fuck us ok I am going to speak with him tomorrow and make sure that he fucks us. Jane smiled thinking that’s cool.