Seven weeks after moving in with her uncle, Emma had become somewhat used to her new life, as far as one ever could get used to being an unwilling broodmare for their own uncle. She had pretty much given up on fighting him when it came to sex. She had learnt the hard way that the more she tried to fight him, the rougher the treatment she would get for it.
The first few days had been hell for her. Dennis had been so excited about finally having his beautiful niece all for himself that he hadn't let up on her for more than a couple of hours when she first moved in. During those first few days he'd had her in every position he could think of, and he had loved shooting his cum into her in every single one of them.
He had grown especially fond of making her ride him, as she really had to think about what they were doing and look him in the eyes as he made her basically fuck herself with his cock.
Emma had tried to avoid thinking about actually fucking her uncle in the beginning, instead imagining herself somewhere else, with someone else, but when Dennis had picked up on that, he had found ways of making her remember at all times that she was with him. Now he constantly reminded her that it was her uncle's cock that was pounding into her, that it was his cum filling her up and his baby that would soon grow inside her. He made her look into his eyes as he came and had started making her ask to be fucked, by playing with her clit with a strong vibrator until she couldn't take another orgasm and asked him to finally take her.
Emma wasn't quite pregnant yet, her last period had come a little less than three weeks after coming here, but with the pace Dennis had been filling her up with cum, he suspected she would be pregnant very soon. Her next period should have started yesterday and it hadn't begun yet, so he hoped he had already succeeded at knocking her up and just didn't know for certain yet.
That morning Dennis had taken her in his all-time favorite position again, with her on her knees as he roughly fucked her from behind. It made him feel so powerful to have this young beauty on her hands and knees with his cock buried in her to the hilt, completely at his mercy. And it gave him the best angle to continually hit her cervix with every thrust, which he enjoyed immensely. Like music to his ears, Emma would gasp and groan as he used his hands to make her cum on his cock as he fucked her, while pushing so painfully deeply inside her with every thrust. It also satisfied the primal part of him that just wanted to breed her and make her take his seed, so he could see her swell with his child.
Just imagining her pregnant, her beautiful tits even bigger, her belly growing and her face flushed as she carried around his progeny, he was hard again. He really wanted to take his little toy again right now, and luckily for him he could do so whenever he wanted.
Her uncle found Emma on the living room sofa, reading a book he had bought her as one of many bribes to try and get her warmed up to him. In time and in conjunction with the hopefully soon aiding pregnancy hormones, he hoped he could get her so used to him that she wouldn't try to leave again and instead accepted her new life as it was. The two times Emma had tried to get away, his alarm system had warned him early and he had gotten her before she could even leave the front porch. But he had had to punish her for it, spanking her roughly both times, which was something he didn't enjoy. It wasn't that he didn't enjoy making her feel a bit of pain, he just preferred using his cock to cause that as he fucked her instead of spanking her.
"Come here, Emma.", he told her now in the strict voice he used whenever he gave her a command. She had quickly picked up on the fact that it was in her own interest to obey him straight away. If she took too long to do something he told her to do, or she didn't do it at all, he would be very rough in making her do exactly what he had asked her to.
With trembling fingers Emma put the book she had been reading away and stood up from the couch, slowly so she could delay the inevitable as long as she could. When she looked at him, she saw that her uncle had already undressed and was standing before her with his cock proudly protruding from his body. She knew what he wanted when he pointed at the ground before him, so Emma got down on her knees before him and started taking his cock into her mouth immediately. She knew that if she didn't, he would use a ring gag on her and force himself into her mouth, something she had learned the hard way.
Dennis enjoyed letting his niece suck on his cock to get him nice and wet whenever he wanted to fuck her. That way he could skip the foreplay and just make her take his dick, instead of having to wait until he got her sufficiently wet before doing so. That was something he was really looking forward to when he got her pregnant, he had heard a number of times that pregnant women were constantly horny and ready to be fucked. That sounded amazing to him, and he couldn't wait for Ema to get to that point.
"Take off your dress, then bend over the sofa, baby." The sofa was just slightly too high for Emma to bend over the back of it without going up on her tiptoes, so she was balancing on them in order to get herself high enough. Dennis enjoyed this position immensely, he needed to lift her up a bit further to get his cock into her tight pussy as she was so much shorter than him, which meant her feet left the floor and she was completely under his control as plowed into her. He quickly pushed his glistening cock into his niece, ignoring her moan of pain as his big cock stretched her open again.
Dennis had been delighted to find out that even after weeks of almost constant fucking, she would still always be nice and tight whenever he wanted to fuck her next, her pussy tightening back up in vain every time, as it would be forcefully stretched again by his big cock only hours later.