Cassie was not your everyday London escort girl. Although callgirls in London come from all backgrounds, she was particularly unusual: a full-time PhD student she had no problems at all offering the "intelligent conversation" that was described on the profile page on her escort agency's website. In fact, she often had to hold back her intellectual instincts for fear of talking right over the heads of some of her clients.
Right now the other problem she had was time. She was getting near the end of the time allotted for writing her thesis. This, in itself, wasn't a problem. What caused the difficulty was where she had to work. Because she was studying medieval literature the manuscripts she had to work with were kept in libraries - specifically, the British Library - and couldn't be taken out. This meant she was having to spend upwards of eight hours a day in a library reading room. This was problematic, as it meant that daytime appointments with incall and outcall clients of her London escort agency were very difficult indeed. Although she could still fulfil most evening appointments, some of her best regular customers were daytime guys.
She had to find a solution, and, being an intelligent and imaginative girl, soon did. If she couldn't visit her daytime clients, they would have to come to her. She could easily spare the odd half hour or even hour of time in the libraries themselves - what are her time was traveling to and from her incall apartment or to outcall dates in guys' homes or hotels. So she struck a deal with the boss of her escort agency: during the day, guys would get a slight discount on her usual fee, but they would have to visit the particular library she was working at.
She also struck a deal with one of the senior librarians, too. Luckily, he was a guy, and more than happy to let Cassie practise her profession in back rooms of the Library in exchange for a weekly blowjob. She still had to be discreet, of course: there were plenty of busybody librarians who wouldn't think twice about trying to impose their frigid ideology on other people and who, Cassie thought, would probably be doubly angry at the thought of a cute young girl getting lots of sex, they all being so ugly themselves.
To her delight, she found that the scheme worked wonderfully. Her clients would turn up and the head librarian would ensure that they were ushered through the reception area. Th e only way in which they turned heads was in their manner of dress: most of them were smartly suited City workers, who stood in something of a contrast to the scruffy readers and tweedy, bland librarians. However, this made the sexy young London escort's job at least a bit easier, as the clients she didn't know were at least easy to identify. As soon as she spotted them she walked up, smiled, and led them off to a back room that she had discreetly arrange for the purpose. It was stacked with boxes of old, old magazines, and in a corner was an old sofa - ideal for her purposes.
A typical client was Darren. He was a nice guy, and intelligent, but not necessarily the type to be found frequenting academic institutions, and still less reading piles of books. He was like so many young, male City workers - good-looking, bright and going places, but more interested in cricket and sexy young London escort girls than with the things of the mind.
The day he turned up, Cassie was particularly pleased to see him. She'd met Darren once before, on an outcall appointment to his flat, and she had been gratified by his niceness, his firm body and the length and strength of his cock.
Leading him into the backroom, Cassie quickly stripped off. She was slim, and had long, mousy blonde-brown hair. Her boobs, although not huge, were a respectable b-cup. Her best feature by far was her bum, which was smooth, small and tight, and which lay at the top of long, sexy, slender legs.
She knew that Darren was in a hurry, which was fine by her, so she quickly pushed him down on the sofa and began to unzip his trousers. His cock sprang out, as large and long as she remembered it, and in a moment she was pressing it deep into her mouth. Right away Darren began to moan and arch his back as he felt his length being inexorably sucked into the back of Cassie's delicate, warm throat. She got going to long, firm strokes, using her hands to steady and half-wank his shaft while tickling his scrotum. Cassie, clever as she was, was also an expert at OWO, and loved nothing more than the feel and taste of a hot cock in her mouth.
Pulling at the cock with increasingly hard strokes, Cassie began to tickle and massage the tip with her tongue. For a little while she pulled it almost all the way out of her mouth so just the head stayed in: she sucked it hard while wrapping her right hand around Darren's shaft and pumping him. She was hoping for a big load of cum to swallow.
Darren did not disappoint her. After a moment or two more her began to groan and thrash about. Recognising the signs of imminent orgasm, the sexy London escort girl plunged her head downwards, so his cock was deep inside her head. He spunk hard, and he spunked a lot: as he filled her cute young mouth with his cum she gently squeezed his balls to get out every last drop. When she was sure he had finished she withdrew, carefully keeping every last drop of cum in her mouth. She sat up, smiled at Darren, and carefully and deliberately swallowed the lot.