Naughty Nurse Nikki

Is Nurse Nikki Naughty or Nice? I'll give you a hint, this story contains A LOT of sex so you be the judge!

Excerpt:
As she spoke, Nikki stood up from her position on the floor, her firm breasts wobbling enticingly as she did so, her nipples deep red pebbles jutting proudly from her chest. She bent forwards and grasped the hem of the long gypsy skirt in both hands, lifting it straight up so I had my first glimpse of her lower body. She was wearing an ivory colored thong under her skirt, a tiny triangle of skimpy material which was much darker in the center than on the edges with what I immediately realized was where she had cum earlier! It was my turn now to lean forward, my face only an inch from her center as I drank in the heavenly aroma of her arousal. My hands reached out and grasped the perfect globes of her ass in my hands, drawing her close to me and burying my nose and mouth in to her groin, intoxicated by the strong, musky smell of her pussy. I drew the flimsy material between my lips, sucking the moisture from her thong and swilling it around my mouth to fully appreciate her taste. As I did, my nose accidentally bumped against the swollen button of her clitoris, causing Nikki to shudder in my grip. Fearful that she would fall over if she 'forgot' where she was, I turned Nikki so that she had her back to the desk and, careful to raise the back of her skirt, eased her backwards until she was perched on the edge of the desk.

Now Nikki was in a perfect position to allow me to reciprocate her earlier pleasuring of my penis. Smoothing her legs apart and lifting her skirt to her waist, tucking it into itself so it wouldn't fall back down, I gazed excitedly at Nikki's bared pussy, taking in every detail of her glorious womanhood. My first reaction was that people who referred to women's vaginas as 'peaches' were absolutely correct; Nikki's pussy was a vision of smooth flesh, bisected by the moist slit of her opening, with its' slightly pouting inner labia puffed outwards from her recent climaxes. A thin strip of closely manicured hair, almost fluffy in texture, rose from the very top of her slit, finishing a couple of inches up; below this, her swollen clit peeked out from beneath its' hood, a shade darker than the pinkness of her labia and looking very succulent. I already knew what she smelt like and could barely contain my eagerness to taste from her honeypot, but I wanted to make her enjoy this as much as possible. I eased Nikki back on the desk a little more, to ensure she was safely placed on the edge but in no danger of slipping off. Then, placing my hands on the smooth softness of her inner thighs, I pushed her legs wide open and scooted my .............