So far:
I fancy my slightly older sister, Jenny. It seems mutual. We have played a clothes swapping game. She wanted to watch me wear more of her clothes and wank while she fingered herself underneath a blanket. Jenny played with my cock and we told each other our fantasies. Mine are about being dominated. Hers was about watching me have sex with another boy - and it made me cum in front of her.
We swapped underpants and met up during lunchtime at school to show and tell. When we got home she asked me to wank for her and gave me a female anatomy lesson. I kissed her arse and watched her wank while I started to tell her about the time I jerked off with a male friend.
Overview of this chapter:
Jenny wanks while I tell her about jerking off with a male friend, she watches me cum into her panties at the same time she cums while fingering herself. She wipes her cunt juice on my shoulder. A few days later Jenny wants to practice fitting a condom to my erect cock.
***
My sister Jenny is as turned on by gay sex as I am by lesbian sex and she is letting me watch her wank while I tell her about my fooling around with a male friend.
'OK, but don't be mad. So a couple of times me and Mike have read the porn mags and wanked in our sleeping bags. We don't see each other's cocks but we are both wanking. Well, I kind of always wanted to watch Mike cum and I wanted him to watch me come.'
'Do you think you are a bit gay?'
'I don't think so, I think about girls most of the time but I get so horny that I just don't care. Anyhow, you know Mike fancies you, right? Well, I told him how you often walked around in panties and a t-shirt. And, so Mike was really turned on about the panties and I ended up telling him that I sometimes wore yours.'
'What! You told Mike that you wore your sister's panties? He could have told people and you would have been so laughed at!'
'Nah, it was cool. He thought it was the sexiest idea ever and said he wished he had a sister so he could do the same. So, then I said I'd get him a pair to wear next time he had a sleepover.'
'Oh Ian, please don't tell me you let Mike wear my panties, I mean...'
I interrupted, 'Well, yes I did but it was worn ones from the laundry basket so they got washed before you wore them again.'
Jenny was still caressing her nipples but had mostly stopped touching any part of her cunt.
'OK, carry on with the story then.'
'Well, the next time he stayed over we did it. I swiped two pairs and we put them on. It was super sexy to be sitting at dinner and thinking about how our cocks were stretching out panties that had been next to your cunt.' I stroked my erection through the pair of Jenny's panties I had now.
'And?' Jenny spread her legs wider and began to seriously masturbate - not the idle twiddling of the last few minutes. Jenny used two fingers of her right hand to twiddle away at her clit.
'After everyone had gone to bed we showed each other how we looked in panties. Then we got the mags and started to wank while we watched each other.'
If you have never seen a teenage girl masturbate then you have really missed out.
Jenny also tweaked her nipples with her left hand. She was thrusting her hips so she mashed her cunt onto her fingers. Of course I had also started stroking my erect cock wrapped in her panties. But my attention was glued on watching her cunt and she had to keep reminding me to continue describing mine and Mike's wanking together. [I will write this story up as soon as I finish "Umm, both, I guess"]
'Hurry Ian, I am going to cum really soon.'
And at that point the idea of wanking with my best friend while my sister watched was too much. I couldn't take it anymore and warned her that I was about to cum.
'Go on then Ian, cum while I watch.'
'OK, I'll skip some bits - I can tell you next time - and, well I came really quickly and, well, and I nearly let Mike fuck my bum, only he came as well.'
I held my breath and tensed. I couldn't take it anymore and squirted a huge wad of cum into my hand and over her panties. No, my panties that my sister had given me to wear. Jenny leaned over for a better look and with a loud sigh of satisfaction thrust her hips forward as she took her hand away from her cunt. Had she just come as well?
We looked at each other in surprise. I don't think either of us had expected things to go quite as far as they had. There was a very awkward silence while we caught our breath. Jenny was the first to speak. 'Thank you Ian. I had a lovely time. I suppose we had better get cleaned up now.'
What the fuck? Jenny was using her polite voice to say that her wanking while she watched me wank was 'a lovely time'?? I didn't know what to say but I knew that in all things to do with these sessions she was the boss but I had to try something.