Max was sitting on his chair clothed once more, in front of the Chronivac as he thought of what to do next when his door opened. He turns to see Rachel, his 20 year old sister, comes in as she closes it and if he's right lock it. "Rachel? is something wrong?" He asked her thinking that it has only been half an hour since the changes he made to her and mom. She looks at him before walking up and kissing him. When she pulled back her face was flushed.
"I have liked you more than I should, but now I can't seem to get you out of my mind." She says to Max shocking him, apparently she has a brother complex on him, possibly had one for Nicki as well before Max made her into a cat girl. Before he can say something she starts stripping out of her clothes making his cock harden at the sight of her nude body. Rachel leans on Max's bed on her hands and knees before looking back at him lustfully. "Take me! Please!" She begged him as she shook her ass at him. The sight of her sexy body did the trick for her.
Max stood up and dropped his pants and underwear, making Rachel gasp at the size of his dick, before removing his shirt. He used the chornvac to silence the room from noise going out, before he stood behind her putting his cock on her ass slowly pushing it back and forth. "You say you wanted me, huh? So you are nothing more than a cock hungry whore that wants her brother's dick inside her pussy, aren't you?" He asked her. "Yes! I can't stand the thought of some other guy taking me, only the thought of you doing the act has let me cum when I play with myself!" Rachel says to him. "Please take me! I need you inside of me!" She begged him again as she pushed back at his cock.
Max smiles before lining up and thrusting into her breaking her hymen. "Yeesssss!" Rachel moans as Max pulls back before thrusting into her again. Max speeds up as Rachel moans before he grabs her breasts groping them. "Your body belongs to me slut! no other man will have you, fuck you, cum inside of you! You're nothing more than a cocksleve for me." Max tells her which only seems to make her moan louder. "Yes! I'm your fuck toy, your cumdump! Use me as you see fit!" She says as she moans. Max goes deeper before hitting something with and two inches of his cock having not yet entered her telling him he has reached her womb. He keeps slamming into it driving Rachel into higher heights of pleasure before the entrance of her womb gives in and his cock hits the back of it. It showed as her belly bulged out as Rachel climaxed hard from it setting Max off as well. Rachel's belly bulged more from the cum pouring into her womb making her look four months pregnant due to the large cock and balls Max give himself increasing the amount entering her and keeping her pussy from letting it out.
Max pulls out of his sister letting her breast go making her fall on his bed before she turns on to her back. Cum pours out of her as she holds her belly looking at it lovingly. Looks like she wants to be bred by him as well. Max thinks about it before going to the Chronivac and letting her become aware of it and lessing the lust impact on her. "Rachel." Max says getting to look at him and then sees the Chronivac. He explained to her what it is and does along with the fact he made it that he currently can't impregnate girls. "I see, I can't blame you but I want your child in me." She tells him. "For how I'm afraid not today but next time I'll set it so it will happen and their won't be any problems from inbreeding as well to others that it's from the two of us but we will know the truth. No need for trouble from others even with the Chronivac." Max tells Rachel making her smile before she kisses him deeply.
Max leans into it before pulling back. "Still is their anything you would like me to do to make up for the fact?" He asked her. Rachel looked at him before...