When my sister Abby inadvertently drank some of my test compound, it led to a whole range of soul searching questions on morality, and possible guilt trips. In the end we had talked it through and came to the only possible conclusion to keep Abby safe and unharmed.
I knew the compound would make her voraciously sexual, she simply wouldn't be able to control herself and would fall easy prey to any sexual predators. The idea of her having sex with any casual acquaintance because of my experimental drug, or being used and abused by multiple partners was too much to bear, both for her and for me. We came to the mutual decision to keep the whole weekend under wraps, or as we thought of it, 'in house.'
Yes, I knew it meant a reluctant incestuous relationship for the duration of the weekend, but with any luck the effects of the drug should be wearing off by late Sunday night, or early Monday morning. In the meantime, Abby was susceptible to and easily influenced by the slightest sexual thoughts or words, all of which she'd amply displayed since Friday night when she first took my, 'love potion.'
I'd even gone out early on Saturday morning, when she was sleeping between bouts of love making, to an Anne Summers sex shop, and bought her a vibrator. I knew I wouldn't be able to keep up with her demands, and the sex toy would help to keep her more urgent needs at bay while I was recovering in between having sex with her.
Perhaps I'm making it sound as if I'm just making excuses to justify having sex with my sister. As if it was some sort of onerous task to alleviate any stigma on my part of being a sister fucker, and I was just some poor hard done by brother. Nothing could be further from the truth. It was the only practical solution to the major, and very urgent problem facing us, but we couldn't deny that it became an amazingly beautiful and pleasurable experience for us both.
Our love for each other had always been strong, but now we'd been thrown together by circumstances in a way that neither of us had ever envisaged. Yes, it was awkward for us both to start with, but there was no other solution and we eventually embraced it, reluctantly to start with, then more enthusiastically as the undoubted pleasure and love led to a wholehearted commitment.
Our Saturday afternoon was spent in love making, and trying to find ways to satisfy Abby's sexual hunger. I briefly thought of calling in help in the shape of Eleanor Hepburn, my first test subject who had done the same as Abby, drank the compound unwittingly and spent an entire weekend voraciously sexual. I knew she'd be delighted to help, but something held me back. The need for absolute secrecy was imperative, always at the forefront of my mind, and I was reluctant to involve anyone else, even Eleanor, my most trusted sexual partner and confidante.
By late Saturday afternoon Abby and I we were both fucked to a frazzle. Completely exhausted, but boy, was it good. A nap seemed a good option, so we both retired to our own bedrooms to remove any temptation that sleeping together was sure to bring. I set the alarm clock for 6pm. That would give us time to get up, get showered so we weren't reeking of sex, and get out to the hotel where I had booked a table for two. I thought an evening out, may take her mind off sex even if just for a little while, plus it would be a good idea to give us both a break, get us out of the house for a change of scenery, and god knows we needed it.
Well, as the poet once said, 'the best laid plans of mice and men, etc.' It all went wrong when Abby sneaked into the shower behind me just as I was working up a lather. She ensured we worked up a different kind of lather, by running her soap filled hand along the length of my cock, and from there things went rapidly downhill. I ended up fucking her in the shower giving her a real classic, 'knee trembler,' against the wall of the shower while the warm water rained down on us both. She came quickly, then crouched in front of me to suck me to a mind blowing orgasm.
'Fuckin hell Abby,' I said in mock protest, 'we were supposed to be saving it for later, when we came home from being out.' She laughed, and slapped my wet bare arse as I turned the water off, and stepped out of the shower.
'Fuck that,' she laughed again. 'I saw your bare arse and your cock, and I couldn't help myself. I was determined not to touch you, and I fully intended to leave you to shower in peace, but somehow my pussy let me down, and I wanted you. Sorry, I just couldn't fight it, no matter how I tried.'
'Abby, it was lovely, you're lovely,' I told her. 'It will wear off soon enough, and then you'll be blaming me for taking advantage of you in your distress.' She shook her head violently, as she used a large bath towel to dry herself and me.
'That will never happen,' she declared earnestly. 'Okay, your, "fuck juice," has made me incredibly horny, so horny that it controls my mind in some ways, and I'm... no, we're doing things I never thought we'd do, but I'm having a wonderful weekend with someone I love. No regrets, I promise you, none whatsoever. How about you?' she finished. I shook my head.
'No regrets for me either,' I assured her. 'I was reluctant to take advantage of your "condition," but it became obvious that it was the only solution. Not only are you stunningly beautiful in every way, but you're a marvellous lover too. I've never made love to anyone who could compare to you in bed.' Then I wickedly added, 'or in the shower, or the kitchen, the living room, both bedrooms.' She laughed and playfully slapped my arm.
'Okay, okay, enough,' she said laughing. 'When I want it, I want it... I need it, and you know that well enough. What's wrong old fella?' she teased in a condescending voice, 'can't you keep up with your much younger sister?' I pointed to the bed and said just one word.
'Doggy,' she stopped laughing, and came into my arms, kissing me lovingly, and then quickly breaking away took up our preferred position on the edge of the bed. Arse up, head down resting on her forearms, bringing her already wet pussy into the premium position for fucking.
I stepped up behind her, lined my cock up with her stunning cunt, fingering it for a few seconds to check if it was ready for me. I needn't have worried, she'd been perpetually wet all weekend and was still wet, so I threaded my cock between those generous pouty lips of hers and on into the glorious wet, warmth that I'd become more familiar with than I should ever have been, or had any right to be.
'Oh fuck yes,' she gasped, 'nobody fucks me as good as you... oh holy fuck, use me... make me come... again... I want... it.'
'Yeah, yeah, I know you want it,' I said in a mock disrespectful tone. 'You're a hot arsed, cock loving slut that needs fucked none-stop to keep her happy.' My seemingly harsh words sank into her brain spurring her on even more.
