Kathy woke. It was daylight and she was now lying alongside David. Sometime in the night they must have separated. "It must be early, sun's not up. Wonder if it will make him mad if I disturb him to piss? Bloody water always running makes me want to go. Seems a bit chilly. Must go and try to work that stupid toilet." Her movements woke David. "Just going for a piss. Or do I need your permission for that?"

"No of course not. Remember to turn the seacock on first and turn if off when you've pumped out your stuff."

"Yeah, yeah, I remember." She intended to spend a little time away from him but the chill air soon raised goosebumps on her skin causing her to shiver as she climbed over him and back under the blanket. David cuddled her again and she could feel his early morning hardness against her stomach. "It feels big. I wonder if he'll put it in me now? It's been a while since the last party. I'll protest but I really would like him to do it to me. How can I arrange it without appearing willing?" She kept her body pressed closely to his even though he didn't hold her tightly.

David was silent for a long while, wondering if he should make the first move. "I know she expects to be my fucktoy as she put it, but should I force her? I really don't want to but my prick's so hard and the way she's pressing against me, perhaps I should make the first move. I'd rather she wanted it but I've read that many girls want to play hard to get. Well it was one of the reasons I agreed to take her on. I'll start playing with her and see if she responds. Probably she'll swear at me, but what's new?" Pushing Kathy on to her back he pushed her thighs apart and massaged her slit.

"Don't think I am going to teach you anything," Kathy snapped, "I know I can't stop you fucking me but I'll just lie still and let you do it. I shan't enjoy it."

"Of course not Kathy. I did access some sites on the net when I knew this was to happen and found out what I should do but we'll have to see how that works out in practice." David's photographic memory recalled every detail of one particular site that went through the foreplay in great detail. Before long, Kathy unwillingly writhed under his fingers and he could feel her wetness on his fingers. "Time now for you to take my virginity," he said as he pushed her legs further apart and inserted his prick. It took a couple of attempts the find the right entry point but then he inserted his prick to almost its full length.

"Aaagh! Remember you thrashed me last night and my arse is sore." Actually it was only a little tender now but his prick was longer, if not thicker than any she'd had previously. It felt nice but she wasn't about to admit it.

"I only spanked you. I didn't use a belt or a cane or whip you, like I could have done, so don't be such a fusspot Kathy."

David started humping, enjoying the sensations he'd never experienced. Kathy tried to keep still but it was a strange experience for her too. Not only was his prick reaching places no other had reached, her mouth, instead of being close to her partner's was almost level with his nipples. "Maybe I should nip them with my teeth. Perhaps not. Don't need another spanking. His prick feels nice but I can't let him know that." Despite not wanting to, her body responded and soon she was gently thrusting back at him. "Sod him. Why is he so good at everything?" After he'd climaxed inside her, he pulled her higher in the bed and cuddled and then kissed her. However, she managed to resist the temptation to kiss him back.

"Time to get up, I want to be under way at seven. You wash first and I'll start breakfast. Don't waste the water. It won't be very warm because I haven't run the generator this morning. You'll need to wear warm clothes to start with today." He bundled Kathy out of bed and into the small washroom. The brass clock in the saloon chimed six. Kathy wanted to know what he meant by 'being under way', but decided not to bother asking.

"What lessons are you going to try and teach me today Professor Streaky?" Kathy asked truculently as they ate breakfast in the wheelhouse in the early morning sunshine. "I want to know what I'm not going to learn. Have you drawn up a timetable of lessons for me not to follow?"

"Today is an induction day. No lessons, just familiarisation with the environment."

"Familiarise me with your prick more like!" David noticed a slight smile on her face.

"That too," he grinned, "First today though we go to Brightwell Quay and fill up with fuel and water and then we head out to sea for a bit of my research. Before that I have to put this anklet tag on you." David showed her what looked like a plastic band with a bulge at one point. Half expecting a comment or a refusal, David grabbed her foot, pushed her jeans up a little way and wrapped the band tightly around her ankle then, dipping his hands in water, he held them around the plastic. A chemical reaction caused it to shrink slightly and harden.

Too late, Kathy cried out, "What the hell are you doing? Take it off. Now!" She started kicking at him but he just laughed.

"Calm down Kathy. It is nothing that is going to hurt you and I cannot now take it off. Maybe you've heard of the tagging system that they use when they release some prisoners. This is a more refined version. It sends a signal to a satellite and that signal can be tracked on computer or mobile phone. If you try and run away, we can easily find you. It needs a special diamond saw to cut it off."

"You sodding bastard! They had more chance of escaping from Colditz than from this 'Beryl May' boat or you." Tears sprang to her eyes again.

David went towards her intent on giving her a cuddle but she sprang to her feet and almost made it to the deck before his arms encircled her and held her close. She tried to hit him but being held the punches were ineffective and eventually she gave up. "Kathy, the band doesn't hurt and you'll hardly notice it is there, in fact I'm sure you'll forget about it before the end of the day. Now there is one other item you must wear whenever you go on deck and that is a lifejacket." He pulled one from a locker. "This really is for your safety. I daresay you can swim but the water at sea is cold and without it you could succumb before we could find you. It's not very bulky but it inflates in the water and it sends out a signal that we can pick up on the radio. It really is foolhardy not to wear one at sea and had he been wearing one, my father might still be alive. Failure to wear one will be a definite caning offence. You might get away with refusing to do lessons but you will not refuse to wear a lifejacket. Understood?"

"Okay Captain Streaky." She stood and saluted and then put her fingers to her nose.

They cleared the breakfast things away, and with both of them wearing the bright red lifejackets he showed her how to cast off from the buoy. By 8:30 they had refuelled and were heading back down river. The water was calm and the early morning sun shone brightly, glinting the waves in jewelled splendour; an ideal day for a boat trip. When they'd cleared the moored boats, David opened the twin throttles to the two diesel engines and the 'Beryl May' surged forward. "See that green buoy, keep the boat headed to the right of it. Let me know if any other boats appear. I'll make us some coffee." Somewhat bewildered Kathy clutched the wheel half-afraid to do anything with it. He'd left her in charge and she'd never been on a boat before last night. Tentatively she moved the spokes first one way and then the other and saw how the boat responded. Gradually she relaxed and felt a sense of power surging through her body with the knowledge that she could control the large vessel ploughing through the water just by turning the wheel a little.

"You okay with it?" David asked when he brought the mugs to the wheelhouse. Kathy nodded. "What about that tiny sailing boat?"

"We have to keep clear of it. Steer just astern of it and when we get close slow down so our wash doesn't swamp them." Soon they were out of the river and on the open sea. There was a slight swell but the 'Beryl May' pushed her way through it with hardly any rocking. "You might think that with all this water, we could go anywhere but there are sandbanks and shoals all over the place so we need to keep to the channels. There are a few buoys but with the sun bringing the mist up from the water, we'll need to watch the compass course and keep and eye on the radar and the echo sounder. We're heading to a narrow trench between the Cod and the Purfleet sands that's about twenty miles out to sea but we can't go in a straight line so it will take about two and a half hours." He showed her the instruments and the place where they were heading on the chart although that was meaningless to her, and then just kept more or less out of her way. Kathy wouldn't admit it but she'd begun to enjoy the day.

Two hours later, David went below and brought up a small wreath. Kathy looked puzzled when she saw it and then when he throttled the engines back to a very slow speed, she guessed. David looked downcast and bowed his head for a minute or so and then tossed the wreath on to the water. When he returned to the wheelhouse, Kathy murmured, "Your father?"

David nodded, "Two years ago yesterday. A line flipped him overboard and the sea was rough. Mother saw it but by the time she'd got the dredge up and the boat turned round, there was no sign of him. His body was washed up two weeks later. It was an awful sight." Almost instinctively Kathy put her arm around his waist then, a few minutes later, when she realised what she had done, she sharply removed it.

"We're at our destination now. I'm going to put out the small beam trawl and a little dredge. We'll be going very slowly so we can get some lunch. The dredge will only be down for a short while but the trawl will be down much longer," David informed her. For a while there was a flurry of activity as David swung the derricks out and lowered the nets into the water. Finally it calmed down and to Kathy they seemed not to be moving at all but David pointed to the water flowing slowly passed them. "Do you think you can get the stove to work and the kettle on? I'll cut some bread and we can have something to eat."

Kathy felt ravenous. "It must be the sea air," she smiled to herself and David caught the look.

They sat eating in the wheelhouse. "What if a sailing boat comes?" Kathy asked, "We can't get out of its way."

Surprised at her even thinking of it, David answered, "That’s why I pulled that old basket up the mast. It tells everyone were fishing and to keep clear of us. Not much comes through this channel anyway, which is why we're researching the life under it. I'm going to haul the dredge now. Stay in here please, I don't want you caught up in the warps." Kathy watched as the steel basket came to the surface and the contents, which seemed mostly shells to her, was emptied into a large white plastic tray that David filled with seawater and covered to keep the sun off. "We'll leave that for a while to settle and then we can look at what creatures are in there. Time for a half-hour siesta - or a half-hour with my fucktoy."

Kathy of course put up a token resistance but in the end gave in to his mock threat of tying her to the mast and whipping her with a thick rope. She knew from the way he said it, that it was a joke. David removed her lower clothes and she did the same for him. For the first time she saw his prick close to. It wasn't fully hard so without thinking she put her lips around it a massaged the shaft. "No wonder I could feel it ramming my cervix or whatever is at the bottom of my vagina," she thought as she studied its length. "It's no fatter than normal, but it's certainly longer than any other I've seen. How's he going to fuck me in here or does he just want me to suck him off?"

Her thoughts were answered when he cleared the chart table and sat her on the edge. He cunt was at just the right height for him to enter. "Hey, I thought I was supposed to be tutoring you in this subject but I've never been fucked in this position before."

"I hope it won't be the last time though," David grinned.

She climaxed well before he did and almost reached a second orgasm when he withdrew. "Put it back, I'm almost there," she cried out but it had quickly softened. Seeing her predicament, David knelt and tongued her slit and sucked her clit until she came again. "Thanks," she muttered as she slid off the table and found her knickers.

David hauled the net a few minutes after he'd dressed. This time they'd caught a small skate, some prawns and a load of crabs. They frightened Kathy a little when they stood up on their legs facing her with claws outstretched. David casually picked up each one and turned it over. "I'm looking for those that are parasitized," he told her. While I sort this lot, can you take her back to where we started trawling and we'll have a haul along the other side of the channel. Watch the echo sounder and shout if it gets down to about two metres. You can see the channel now that the sand banks are uncovered."

"Is your mother still alive?" Kathy asked when the trawl was again in the water and they were making very slow progress along the edge of the sand.

"Yes. You'll probably meet her. She has a cottage a couple of miles from Brightwell and I stay there when it's too rough to get on the boat or I just want a night ashore and a proper cooked meal. She won't come on the boat though. Brings back too many memories."

"And how will you introduce me to her? Mother, this is my new fucktoy?"

"Perhaps by then you'll actually be a student!"

It was late evening before they arrived back at the mooring. Kathy controlled the boat most of the way and because of the low water level, for part of the time, the course was more tortuous and the speed had to be reduced until they came to the main shipping channel. He even allowed her to coast the boat up to the mooring buoy, directing her with hand signals. They picked up the mooring first time. "Well done," he praised her when he cut the engines and they made their way below. "There should be enough hot water for a shower if we share. The engines have been running all day so the batteries will be fully charged."

Kathy didn't even balk at sharing the shower. She knew that day something had changed between them. She'd had a day to remember. However when she dried her legs and saw her plastic anklet, she recalled her status, she was a prisoner. But the day had been exhausting and she was too tired to worry about it.