She moved flatter still and at the same time took a hold of his waist with her left hand and began to pull him over on top of her. She was ecstatic that he was not resisting her. She placed the head of his dick at her entrance and began to buck up toward him. She felt him moving also and as a result, suddenly there was about an inch of his cock inside her. She relaxed and a little more of it moved into her vagina. Bob was moving now too, the movements of lovemaking taking over in an instinctive way. He was actually fucking his little sister. Putting a little more of his huge cock into her with each little thrust.
" Oh God Nick, I'm sorry, I'm so sorry, I know this is wrong but I just can't stop. You are so beautiful and sexy and I want you so bad. Please forgive me but I can't stop," Bob said.
"Bobby, my sweet Bobby, I don't want you to stop and you don't have to apologize. I've wanted you for a long time. I think for years actually, though I didn't realize it at the time. I'm so happy that you are my first."
"Then you are a virgin! Or I should say you were a virgin. Does it hurt, does it feel like you are bleeding or anything," Bob asked.
"No silly," Nicki replied, " I was so wet that there was hardly any pain at all. It feels awfully full but it is so good, oh Bobby, I love having your cock in me. I love fucking you. Oh Bobby fuck me, fuck my pussy good."
Bob continued to push slowly, withdrawing only slightly, then pushing again, finally lodging himself fully into her molten pussy.
Nicole grunted as he continued his advance. Finally she could feel his balls up against her ass.
"Nicki, it feels so tight and hot, just like velvet. I won't be able to last long baby, I know I'll cum quick."
"It's OK Bobby, cum for me please."
"Are you on birth control, " he inquired, " do I need to pull out?"
"I just finished my period sweetheart, It's alright, you can cum in me, I won't get pregnant."
Bob picked up the pace, moving rapidly, thrusting deep into her pussy and then almost withdrawing, only to push it back in, the tip reaching her cervix.
"Ungh, ungh, ungh, oh Bobby, fuck it, fuck that little pussy, fuck your baby sister until she can't stand it anymore. "
Bob was slamming it into her now. Her pussy had opened and adjusted to his size though it was still extremely tight but comfortable. She was juicing great, her secretions bathing his cock in lady juice.
"Nicki, oh Nicki, I love you so much, I can't get enough of you. I wish we could stay here and just fuck forever."
"Bobby, I love you too baby, I love you so much, I want to just keep fucking you and fucking you. Fuck me hard Bobby, fuck my pussy hard, oh Bobby, fuck me harder, fuck me fast, oh Bobby I think I'm gonna cum!"
"Nick! Yes baby, cum with me, cum with me, I'm gonna cum soon."
Bob was pumping her hard now, very hard, the couch was shaking, it seemed the whole world was shaking. It was about to happen. Suddenly, he could feel a difference in her pussy. It was if it were quivering, then it clamped down on him and he knew she was cumming.
" I'm cumming she screamed, Oh Bobby, I'm cumming hard. "
At this moment he could feel the sperm beginning to erupt from his cock, spraying the inside of his sister's vaginal canal with his potent sperm. He hoped that she was right about not getting pregnant because he was really filling her up.
"Bobby, she half whispered, it feels like it's clear up in my belly. Oh baby, I can feel it squirting up in me. I love it my sweetheart, I just love it. Promise me we will fuck at least once every day. I could spend the rest of my life fucking my big brother."
"Nick, I know that we can never go back. I know I should say that we will never do this again but that would be a lie. Yes sweetheart, we will, but we must also be very careful. You know that. Think what would happen if Mom or Dad found out. They would probably kill me. Yes baby, we'll continue to fuck, I guarantee that, but we must find the time only when it's safe. Speaking of safe, I'll run to the store tomorrow and buy myself some condoms. We sure can't afford for a pregnancy to occur. Right? "
"Yes Bobby, I guess you're right, but I like to feel bare cock, not something encased in some kind of rubber or plastic. "
For some reason as his cock receeded and moved from her vagina with a plop he decided to reach up and tickle her like when they were little. He reached up and began to tickle her under her left arm, she reacted immediately.
"Bobby'" she squealed, " what are you doing. " She was giggling and trying to move away from him. He continued and then suddenly stopped as he remembered her injured ankle. Just as suddenly she jumped up and ran from the room with not the slightest limp.
" Hey you," as he ran after her, " what about your ankle? He chased her toward the family room. "What did you pull on me you little turd?"
He caught her halfway across the family room and hugged her from behind in order to stop her.
"What the hell is going on girl? I thought you hurt your ankle. Did you just fake that? Why?"
She stopped struggling against him, turned her head toward him smiling broadly, " and it worked too, didn't it. You were so worried about me, you couldn't even think straight. All you knew was that your baby sister was hurt, and before it was over, I got you to fuck me didn't I, hmmm? Didn't I Bobby?"
He admitted inwardly that she was right. It had worked exactly as she had wanted it too. At the same time he realized that they were both naked still and he had his crotch pasted right up against her ass, and she had taken the opportunity to start slowly moving it side to side, just an inch or so at a time but enough that his cock was starting to come alive again.
"You little tease, yep, you got what you wanted, now you may get more than you want."
"Oh Bobby, I'm beginning to feel exactly what I want. Are you going to take me right here? You gonna put that big cock of yours in my little pussy again and fuck me with it?"