She eyed me with what looks like almost sympathy and whispered "the rules are the rules". 

I eased my self off her and loosened her wrists and she slipped free indicating that it was time for me to replace her on the bed. 

As I lay I felt her warmth and sweet scent on the sheets, and as she leant across to tie my left wrist, she pressed against my cock either deliberately or accidentally. 

She took my right hand in her left, and I suddenly felt the other stocking and her firm hand slowly and methodically rub the length of my shaft. 

The sheer, satin touch sliding up and down started to drive my wild and for a split second, I felt that suddenly tightening in my balls that means I'm about to blow my load.

After a few moments, she slipped the stocking over my right wrist and pulled it slightly tighter, so like her, I could easily escape if I needed to, but that was the last thing on my mind!

I really expected her to use up a fair share of her twenty minutes before we actually got to fucking, but as soon as I was tied, she straddled me, and lifted my cock so she could rub her wet lips with it. Then she lifted, guiding my tip to her swollen opening. 

For a few seconds, she seemed uncertain, starting to slide down on me, but then pulling away as if she didn't want to.   The anticipation was driving me crazy and I moaned with relief and she finally sank down with my cock meeting not the slightest resistance as I slid deep inside her.

As soon as she had me inside her, she started to thrust frantically and I wondered whether it was for her orgasm or whether she wanted me spent as quickly as possible, After a couple of minutes, I couldn't hold any longer and I shot what seemed like every drop of cum I've ever had inside her.

I collapsed back on the bed almost exhausted, thinking that's the end of the most amazing sex I've ever had.   We rested for few minutes, she still straddling me, my deflated cock still inside her, and imagining I can feel my cum dripping down from deep inside her.

She glanced at the alarm which I couldn't see, and the same slight smile appeared as she lifted up and off me. 

Before I knew it, she again straddled me, this time with her knees up against my armpits. She lifted herself slightly so her glistening cunt was only about two inches from my face and I could see every glistening bead of moisture and her delicate, wet pubic hairs sticking to her skin. 

Slowly she slid her right hand to the lips of her sex, parted them and started to rhythmically rub around her clit with the second and third finger.  I could see the opening of the swollen slit stretching slightly apart and my cum starting to seep out of her. 

She felt it too and slid her two fingers deep inside herself. After a few seconds movement, she extracted them and pressed them into my mouth, forcing my lips apart, and her cum soaked fingers into my mouth.

Still holding my lips apart, she lifted herself slightly higher and forward so her leaking slit is over my mouth and I started to taste the salty cum dripping from her into my mouth.

She's now rubbing frantically and I knew that that massive orgasm for which she was yearning was close, She was moaning loudly and suddenly let herself drop onto my, her juicy snatch almost suffocating me as it contracted almost violently as she exploded into orgasm and I could almost feel the warm waves of relief flowing out of her

After a few moments and still panting, she lifted off me and turned in the other direction, 69 style and started to lean forward   My cock was semi-hard again in an impossibly short space of time and I was waiting for the feel of her tongue teasing me before she took me into her mouth. 

But she stopped just short, and bent forward slightly until I could just feel the fringe of her short hair brushing lightly across my prick as she flicked her head from side to side 

Her hand slid back between her legs and I knew she was going to bring herself off again. Her fingers were still moist from the mixture of juice and cum, and she slid them slowly between her lips. I was thinking she wanted them back inside her slit, but she slowly rubbed them up and down almost as it she wanted to collect as much lubrication as she could.

Before I know it, her forefinger moved further back and was rubbing around the rim of the lovely taut arsehole just a few inches from my eyes, slowly moistening it, until her finger slowly disappeared up the tight ring, penetrating deeper and deeper.    Only seconds passed and she was thrusting it in faster and deeper as she leant forward and started flicking the tip of my cock with her tongue.

Suddenly she extracted her finger and leant across and over to her handbag alongside the bed. I could hear something being opened, but couldn't tell what it was until she straightened up and I felt smooth, cool sensation of a lubricating jelly being rubbed up and down my shaft.

She moved further until I felt her wet pubic hair rubbing against me. Leaning further forward, she lifted herself and eased my cock back until it was caressing and teasing the rim of her now slightly swollen arsehole. 

I almost swooned as I knew what was coming next ... she slowly, but deliberately lowered herself and I felt myself sliding smoothly into that tight, forbidden anal passage.

She rocked backwards and forwards faster and faster, trying to drive me further and further up into her. Even from behind, I could see she was masturbating frantically and it took about 60 seconds before I exploded inside her again

I lay back almost unable to move and with no idea of how far we are through her twenty minutes.  I felt her body roll off me and my totally depleted penis pushed gently out of her.  She slipped off the bed, and as I lifted one eye, I saw her pick up her ruined panties and wipe herself dry with them.

I suggested she untie me, but she just looked at the clock and said "still got four minutes left"

She rearranged and clasped her flimsy bra, slipped her dress back on and turned to the door.. With that same shy smile, she tossed the wet panties on my face and whispered softly "you can keep the stockings too"

I was nearly too exhausted to move but I started to position myself to slip out of the loose bonds. But as I do, her voice echoed back to me "the rules are the rules" and I collapsed back until the alarm sounded a few minutes later.

I carried those stockings from then until today when I again bumped into her leaving the office, this time just outside the office. Reaching for them in my inner jacket pocket, I smiled at her and asked quietly "will you miss your train again?"

That enigmatic smile crossed her lovely face as she said "oh, I never catch the train, I drive to work everyday"


