Rachel and I lay in each other's arms for several minutes after our urgent lovemaking. Her head rested against my chest and I breathed in the fragrant perfume of her hair, her wonderful and crowning glory. Eventually she lifted her head and smiled.
'Well, John, you certainly do love me,' she whispered, 'I think you came twice when you went inside me.'
'I love you more than my life, darling Rachel,' I replied. 'How am I going to manage without you when you go away to university?'
She pondered for a while and then said with a mischievous grin, 'Oh, you'll manage. You've plenty of photos of me to masturbate over and I'll leave you this black slip and these panties to help you.'
'Rachel, stop it,' I chided, 'don't cheapen our relationship with such crude talk. I'm surprised at you.'
'Come off it, Uncle..er, John,' she teased, 'I know full well what you must have got up to all these years before you finally owed up to your feelings for me. You had a stiff cock for me that time on holiday a few years ago and I know why you disappeared so quickly. You had to relieve yourself, didn't you?'
I murmured my assent, realising that this beautiful girl wasn't quite as innocent as I had naively thought. Our eyes met and a sudden mutual understanding seemed to hold the promise of a deeply satisfying sexual adventure together.
Rachel suddenly took hold of my hand and placed it on her silky black slip.
'Feel it, John,' she breathed, 'isn't this the reason you were able to come twice? Couldn't you feel it slithering up and down against your thighs as you made love to me? This slip is so special to me and so very erotic. I had no idea about slips until Mum introduced them to me. In fact, she gave me this one from her collection.'
I noticed that she suddenly seemed awkward and her face looked flushed.
'Rachel,' I replied, 'my mind's in a whirl... yes, I have to confess that your slip is really sensual and I guess it did help to send me over the edge a second time. Anyway, what's this about your mother? I remember a while earlier you said something about you and she 'having a thing together' with slips? What did you mean exactly?'
Rachel then proceeded to recount the time when she and Louise, her mother and my sister, were about to get ready for a wedding when a discussion about slips led to their making love together both dressed in slips and bra and panties. It seemed that a mutual, and for Rachel, a new-found love of nylon slips had led to a whole new perspective on their relationship.
I listened with growing fascination as hidden depths were being revealed in this beautiful girl, and I was conscious also that my cock was hardening inexorably to its full height as she shared this deeply secret passion with me.
'Oh, John, I'm sorry, you must be shocked to hear this, but it just happened -- Mum and I have found a special way to enjoy our lingerie together and we love each other even more now.' Rachel looked at me as if to elicit my approval, but a glance at my rigid penis was her answer.
She studied me with her limpid brown eyes. 'Would you like to experience what a slip can do for you, John?' she asked, her voice thick with desire.
I nodded and she motioned for me to sit on the settee. I watched in fascination as she stood in front of me and slowly slid her little black half slip down her legs and removed it, clutching it in her hand. She then knelt and proceeded to gently rub the slip against my thighs and over my throbbing erection. As she did so, she tossed her head back and forth, cascading her glorious soft hair against my legs. My head swam in a blur of delight. This was almost sensory overload. Her lovely hair and the soft black delight of her slip were working a special magic.
'Feel my silk encase your cock, John. Think how much you love me and love my silk,' her voice cracked with emotion as she tightly covered my hardness with the soft black nylon and then slowly, oh so gently, wanked me. The pre-cum was oozing from my cock head through the material as very gradually she sped up her ministrations. As the dam was about to burst, she stopped, leant forward and kissed me.
'Oh God, Rachel, finish me off, please,' I begged, as once more she tossed her head and draped her soft hair over my face.
'I love you, John -- so much', she whispered in my ear, 'and isn't it so good that we can share this slip love together?'