Ruby was my new secretary, or PA as she styled it. She was terribly proper, calling me Mr, married and super efficient. I was, eventually, to discover that she organised her knickers in her underwear drawer in style order (thongs, strings, pantyhose etc) then in descending colour order, from solids to pastels with patterned pants in a third partition. For now, she was just extremely organised, and so, as a result, was I. She was also extremely attractive. 15 years younger than me, in her late 20s, slim, with heavy shoulder length auburn hair, big green eyes, full lips on which she invariably wore bright red lipstick and pale skin. But she was very conservative in her dress style, wearing clothes about 20 years too old for her. To begin with. We had a slightly distant relationship, appropriately professional, for the first couple of years. Then one day she told me she was having her office, which was right outside my own, reorganised. After a couple of guys had humped furniture around for an hour or so, Ruby was sitting directly opposite me, in profile. “Now I can keep an eye on you” she told me, smiling, which was a rare pleasure. Infinitely more to the point, I could hardly keep my eyes off her. I realised that the casual outfit she had apologised about when she’d arrived that morning, excusing it on the basis of the office works, and which consisted of a tight, cashmere jumper and possibly even tighter jeans, revealed something I had not noticed in the previous two years: Ruby, my demure and totally professional PA, had an incredible body. It also dawned on my very shortly thereafter that the office move had not been unintentional. Ruby sat in profile each day wearing appropriate but alluring clothes. Her breasts were very large on her slim frame and her bottom perfectly shaped. One day, I even got a glimpse of stocking tops. There was obviously far more to my oh so respectable PA than I had suspected. Almost inevitably the office Christmas party brought things to a head, so to speak. It may be a huge cliche but it’s a productive one. After several glasses of wine, I rescued my tipsy PA from a boring conversation with finance and led her, uncomplaining, to the board room where, in the dark, we spent 15 minutes kissing passionately, my hand up her dress in her wet pussy as she panted into my mouth. The following morning she arrived hung over and sheepish. She stood in my office and apologised for her behaviour the night before, asking “are you going to fire me?” I walked over to her, pushed her up against the wall and said “no, I’m going to fuck you.” She smiled and reached forward to kiss me. “Good,” she breathed, licking my lips, “it’s about time.” We started an affair that instantly escalated into frantic sex at all and every opportunity. She was indeed, magnificent naked, her breasts not only big and tipped with hard, pale nipples but also firm and so sensitive that sucking her would bring her immediately close to orgasm. Her pubic hair was dark and heavy which I once commented on. She shaved it that night and stayed that way ever after. But her arse was the focus of so much of my pleasure and hers. She told me right from the start that she had never had anal sex of any kind but often wondered how it would be. She found out very soon and loved it. I would wank her to orgasm with my fingers in her anus as she bent over my desk, knickers round her knees, whenever the office was quiet. She loved having me rim her and on occasion was so horny we would quietly lock the door of the ladies so she could lean over a sink as I knelt behind her in my suit, licking and tonguing her arse as she masturbated to silent, handover mouth orgasm, before sneaking back to her desk, shaking. And within a month of the Christmas party, I was dry fucking her anus from behind most evenings as soon as everyone else had left, bringing her to multiple orgasms before she turned to crouch in front of me, performing arse to mouth so I could cum between her willing lips and not leave my spunk oozing from her when she went home to hubby. This went on for years. Ruby it emerged had a huge sex drive which her husband, a pilot who was often away, had no idea about. We began to fantasise about all kinds of scenario but her favourite and mine was a threesome with another guy. That was how we came to be driving one Saturday evening, when her husband was away flying, to a hotel near Southampton to meet Pete. He was one of the hundreds who had replied to our advert on Craigslist and just an ordinary guy with one difference. He was huge. Ruby reckoned if she was going to do it she would do it right and try a really big cock. That was her only stipulation. Pete on the other hand wanted a slim girl with big tits who would worship his cock. A marriage made in heaven! To be continued