As a young teen, my best friend Jeff and I had a den in the woods behind our houses where we used to retreat to during summer break. It was basically an old disused woodshed which we had cleaned up and kitted out with some carpet, an old sofa and chairs and a radio. We kept a stash of softcorn porno mags which we looked at from time to time. One day when I was in the den waiting for Jeff to arrive, I was looking through one of the mags and had been gently stroking my cock through my shorts when the door burst open. It was Jeff's sister Liz, who'd come to tell me that he had been taken to the dentist by their mother and wouldn't be back for a couple of hours.
I dropped the mag onto my lap to hide the bulge in my shorts when Liz asked what I was doing. 'Are you jerking off' Liz asked, in a knowing sort of way. 'No' I replied quickly, 'just reading'. She leapt forward and grabbed the mag from my lap. 'What's that bulge in your shorts then'? she asked, 'It's your hard cock, isn't it'? I could have died of shame at being caught out by Liz. 'Do you want to see the real thing'? she asked as she lifted her skirt to reveal a pair of pale blue bikini panties. My cock felt as if it had grown another inch inside my shorts. I tried to act nonchalent and said; 'The chicks in the mag don't have any panties on though'. At which point Liz hooked her fingers under her panties and dropped them to the floor. I was now staring at Liz's sparsely haired pussy as she paraded before me. I was beginning to see my mate's sister in a new light! She sat in the easy chair opposite me and draped each leg over the arms of the chair. Her pussy lips parted and I could see her red inner lips.
'You've seen my naked parts, now get yours out' she said, referring to my cock. I gingerly pulled my shorts down freeing my stiff cock. 'Wow, it looks so hard' Liz said as she stared at my throbbing cock. 'Go on, stroke it' she said as she gently rubbed a finger up and down her pink slit. I grabbed my cock and began pumping it as I stared at Liz. 'My cunny is getting wet' she said, as I could feel the pre-cum leaking from my cock. I sped up my stokes as Liz urged me on. 'Make it shoot some cum' she said as she slipped a finger in and out of her wet pussy. I was on the verge of cumming when Liz approached me and stood over my hard cock, her skirt in her hand and her pussy just inches away from my face. My cock exploded with ropes of cum, some of which landed on her thighs and belly. 'Oh my God' she cried, 'it feels so warm', as my orgasm subsided and I milked the rest of the jism from my cock. 'We'll have to do this again sometime' as she replaced her panties and left the den.