I just smiled

I smiled as I turned around, his cock slipping from my cunt. I looked up at him as I brought my face closer to his cock. As I pulled the skull off him I asked, "Would I have offered if I didn't want that?" Before sucking his cock into my mouth and cleaning him with my tongue.

"Oh God, Kimmie, you are such a slut," he moaned as I licked and sucked him.

He was still mostly hard as I finished cleaning him, "You haven't seen anything yet," I told him. "Next week I want you to fuck me and cum in me and try your hardest to knock me up." He moaned again, his cock thickening in front of my face. "And my the time you have, I want to feel all of you buried in me, I want to feel you fucking my god damn lungs as you try and give me your child."

As I spoke and stroked him he smiled, "Well, how could I say no. But what happens if I do knock you up? What happens if you end up pregnant with my child?"

"Well I guess that depends, if it's a boy, then in eighteen years you can watch your son try and knock me up, and if it's a girl, then in eighteen years I would like to see her sitting astride your magnificent cock while I suck your balls."

He grabbed a fist full of my hair and pulled me towards his cock, "Who's my little cum slut?" he asked.

"Your sister is your little cum dump," I said as I sucked him back into my mouth. I started to swallow and leant forward to get a better angle. He understood what I wanted and started to fuck my face in long slow strokes, letting my throat become accustomed to his thickness and length.

"Well my little bitch, show me how much you want my cock and swallow," his calling me a bitch made me shudder, it was right, my brother treating me like his own personal fleshlight. "And don't you dare throw up or you will be licking dad's leather couch clean with your tongue." I did as he begged and kept sucking him deeper before long he was fucking half his length into my throat. I could feel him pushing against my larynx, stretching out his fuck hole. "I'm going to set up a game of cards and share you with all my high school friends, all of them will know you are eager to be your brother's little slut." I couldn't moan with how deep he was, but I wanted too, I wanted to let him know that that sounded so hot to me, that I wanted him to share me, to make me his willing cum dump for him and his friends.

I thought his stamina was impressive before, but now, after he had cum once, it was just glorious. By the time he told me he was about to cum he had almost his whole length down my throat and I had cum, just from his cock in my gullet. "I'm going to spray all over your face and you are going to sleep the night coated," he told me.

As his cock swelled within the confines of my throat I pulled back and squeezed my tit's together to give him a good place to aim for and stop his load from dripping onto the couch. His first spurt sprayed over my face plastering my eyes, then as his second came I heard the door to the den slide open.