This summer I went on holiday with my half brother and his wife and their three kids, Jenny 15, Kim who is 13 and Paul who is 9. I have been on holiday with them a lot in the past and babysat many times. Jenny and Kim are I are very close. I have had bi tendancies a great deal in the last few years and recently I have been masturbating thinking about Jenny and Kim's developing bodies and remembering how horny I felt at that age (and still do!).
This year us girls shared the same room and the sight of them wandering about naked made me constantly aroused, I masturbated most nights and saw both girls a few times making hand movements beneath their bed sheets. I had a few horny paper backs with me and the girls asked if they could borrow one, I said ok but don't get caught by your parents. Often our conversation was about the books and Kim in particular would blush about any of the sex scenes.
One afternoon I was on the balcony listening to music and Kimmy was laid out on a lounger half facing me reading. The rest of the family were in the pool. I had my eyes shut and listened to my music. A while went by and I opened them slightly, Kimmy was opposite me, knees up with her book resting on her thighs, her skin was golden and I could just make out the shape of her young breasts starting to fill her bikini top, what was obvious was her nipples poking through the thin material and I wondered if she was reading a horny part!
I felt my own pussy moisten as I glanced at her firm thighs and where her bikini pants bulged over her sweet pussy, as I looked I could make out the shape and I remembered how it looked in the shower. Her bikini had sucked up into the groove between her lips and as she gently moved her thighs the soft material stretched over it, I became aware of my own bikini feeling moist as I peeked at her.
I felt her looking at me so I slowly closed my eyes and I felt my nipples harden and pussy throb at the thought of her looking. A few moments later I slowly opened my eyes just enough to look across at her, she had now placed the book at the bottom of her thighs which had drifted open, her nipples were like bullets and I could see her chest rising and falling, then I noticed her squirming a little and saw she was in fact gently rubbing the spine of the book over her bikini over her pussy, she had the hard corner over the area her clitty would be and she was rubbing it around as she read.
My pussy throbbed at the thought of her sweet lips swollen and pink beneath the material of her bikini, I felt my own swell up and push into the crotch of my bikini. Moments later Kimmy got up and went to the loo, no doubt to rub off, with that I plunged a finger into my soaking hole and came very quickly.