As the days and weeks went past, and their love making became more of a regular habit, Riley realised a number of things. First was how she had become addicted to him; she couldn't wait to see him and fantasised all the time about them being together. Secondly she noticed that each time they made love he pushed her a little further; introducing a new skill, or just stretching her capacity or stamina a measure further. Thirdly the penny dropped that even when he had asked her what she wanted, he had only used that as a starting place, an inspiration if you like, for whatever it was he wanted to do to her.
Finally, she realised that the more he controlled her, the more helpless she was, the more she was liking it. She trusted him totally, and gave herself up to him completely, and that was the best feeling ever.
He was skilled in his manipulation of her body, and took care to never mark her, but when she was left with a bruise on her wrist from him restraining her too tightly; rather than hiding it, she displayed it to the whole world with pride as what her man had done to her (as if the world would notice!).
Something was noticed though. When she visited home for the first time that term, before they even got home from the station her younger brother had announced to their parents, "Riley's lost her virginity!" Whether he was just being an idiot, or whether he really had picked up something who knows, but it made her blush, and her parents were mad with him.
Something had also changed at Uni. There was no doubt that the boys on her course had started noticing her more. She had felt invisible before, as if they hadn't seen her as something sexual, but she was aware of their eyes following her, and whereas previously that would have made her more shy, she now quite unconsciously had a little extra wiggle into her butt, and held her shoulders back a touch. Not that she would flirt though; she wasn't remotely interested in anyone else, it just reflected her new confidence and sexuality. She would probably have laughed at the thought that a boy of her own age would be able to satisfy her now.
He had been quite rough with her though, when he fucked her on her back once he had twisted her nipples hard, and then kept slapping her tits, leaving his finger marks on them, until they just went red all over. She could cope with the pain, but more enjoyed the heat and buzzing sensations afterwards as all her nerve endings went into overdrive.
He had put his hands around her throat too, and one time it did seem like he might have lost control of himself, but he released her just before she lost consciousness but not until she'd had an orgasm that really did feel like a "little death".
She wondered where this would end; whether he needed to up the ante every time to maintain his excitement , or whether he was still just training her. She knew however that the journey was one she wanted to take, and hoped that she could take whatever he would send her way. She trusted him, given the tenderness that he had shown her, that he wouldn't do anything to harm her.
He had explored her ass and her throat more but without much success at either end, she was just too small. He did however love how she writhed as he slipped his finger up her ass when they were fucking, as a way of pushing her closer to the edge, and he loved the sensation of his cock plugging her throat, even if she didn't know how to, or couldn't physically, fit it down there.
The first time he came in her mouth was unforgettable. He had already fucked her and made her cum over and over on his cock, so when he started fucking her mouth it was slick with her juice before her saliva added more lubrication. He didn't think to warn her, and she was just concentrating on riding his bucking cock with her mouth as best she could. Suddenly she was drowning in a flood of cum. She clamped her lips around his shaft, not wishing to lose a drop, sucking and licking on his fat cock as it continued to shoot at her epiglottis. She finally fell back, gasping for air, eyes wide and teary, cum dribbling down her chin. He kissed her right there, right in the mess of it, telling her what an amazing baby slut she was becoming, then made her hold his cum in her mouth like a paint pot, dipping his fingers in, then painting her face with it.
He took her photo just like that; sprawled, frosted, and happy; and kissed her again, before allowing her to swallow and clean herself up.
His wife was, as expected, pregnant, and his first response to that news was to shut himself off from Riley. He told her why he couldn't see her anymore, which led her to get more drunk than she ever had in her young life, and left her sobbing in a heap. He quickly found though that his wife's new status didn't diminish his need for Riley, and, although he tried to resist, it wasn't long before she was again screaming in ecstasy as his long cock lifted her in the air.
Despite this, he couldn't wait for his wife's belly to grow and for her tits to be swelling, and he wondered how kinky he was in being desperate to taste her milk. However being pregnant somehow elevated the dignity of her womanhood above the fucking that he had given all his lovers to that point. He had always placed her on a pedestal, but it had gotten higher, and it wouldn't seem right anymore to play sex games with the mother of his child.
So he needed Riley and Emily only more. His wife had always known that he wasn't faithful to her; she could hardly miss it when he came home sometimes reeking of pussy. She recognised that he had an extraordinary sex drive, in the same way that his intellect was on a different level to anyone she had ever met (which was a massive turn on in itself), and that she couldn't meet all of his various sexual needs alone. In the early days of their relationship they had tried a threesome with another girl, but she wasn't attracted to girls at all, and they ended up just competing for his cock; which might have been fun for him, but not so much for her (although she did win)! So since then she had just tacitly agreed to be blind to his "hobby", as she thought of it.
A conference came up in the capital city towards the end of term and he was invited to give the key note lecture. Previously he had always gone to these things alone, having found that there would always be groupees amongst the student attendees who wanted the trophy of sleeping with a big name in the field. He was never rough with them but enjoyed the pleasure of having a one off fucktoy. This time, however, he couldn't resist the thought of having Riley to himself for a whole couple of days. They would have to be good around the conference, acting like professor and research assistant, but the hotel and city was big enough for them to disappear into for most of the time.
Riley was of course utterly thrilled and beside herself when he told her, and when they were on the train she delighted in shocking the other passengers by snuggling on his lap, and snogging him lewdly. The age difference wasn't such that they were mistaken for father and daughter, but she looked so young, and him so worldly-wise that something just looked off - although at least one of the other passengers quite obviously would have liked to have swopped places.
When they got to the hotel they checked into their two adjoining rooms, but she went straight to him and they barely got the door shut before they were ripping each other's clothes off and fucking like animals on the bed. It felt so good to be in a bed; such a luxury after his office.
After taking the edge off their lust, they showered and dressed. He helped dress her, putting her in a tight vest top that she would usually only wear under a shirt, and a skirt with no panties underneath, before they went out to dinner in the red light district.
It was the first time they'd been out in public and she thrilled at walking along the street hand in hand. She noticed how he moved with effortless athleticism, his ass tight in his jeans, and his massively powerful arms and shoulders apparent under his crisp white shirt. Other women obviously noticed him and she glowed with pride to be with him.
He took her to a sex shop before dinner; she, amazed at all the sexy clothing, enjoyed fondling the leather and rubber paraphernalia. They chose a ball gag, a leather riding crop and some clamps that he thought may be useful, together with some restraints that would work with their hotel bed.
He then took her out for a pizza, enjoying the way her tiny nipples poked through her top and how the waiters were so obviously lusting after her. She loved being out with him and being the centre of attention, drinking a bit too much red wine, displaying her bare arms, shoulders and so smooth arm pits by playing with her hair; letting her small breasts stretch the material of her top as she arched her back.
He gave her a lecture about BDSM, being very serious as he taught her about safe words (which made her giggle), but she solemnly swore that she did understand and would always stop him if she felt uncomfortable.
She was so turned on by his physicality; just by him rolling up the sleeves of his shirt, showing his strong forearms and dexterous hands.
Afterwards he took her to a sex cinema. She was a bit scared and wasn't sure she wanted to do it. She was surprised to discover that ladies got in free. He led her by the hand into the darkness of the cinema. She couldn't really make out the surroundings, but on the screen was a close up view of a massively magnified cock plunging into a girl's anus accompanied by her very fake moaning and groaning. The camera pulled back to show her sucking on another cock.
Riley was aware of the smell of male sex hanging over the room, and as he led her to their seats, had a vague sense of other people in the darkness around them.
As her eyes adjusted to the darkness, she could make out perhaps 10 men dotted around the cinema, mainly sat on their own; although she could see two men together in the front row. She could only see those on the rows opposite with any clarity but she got a strong impression that most were playing with themselves, either under their clothing, or flagrantly with their dicks out. She then realised that most were turning every now and then to check her out, and she suddenly feared that the action they were really interested in wasn't on the screen -they could after all be at home on the internet if they just wanted to watch porn! She retreated for safety more deeply into her man's arms, but he seemed engrossed in the screen action, although he did drop the arm he had around her into a position where he could play with her far nipple.
After a few minutes he unzipped himself and pulled out his hard dick.
"Stroke it for me," he ordered. She reached across as discretely as she could manage, not wanting anyone to see, and started masturbating him pretending to be just watching the film. In truth it was fascinating her. Now the girl on screen had one huge cock in her pussy and another in her ass. She had no idea that was even possible but it looked insanely intense.
She noticed that the other men's looks had become more frequent and blatant now although no-one had moved.
"Go down on me," he said.