Day Three
Waking up had never felt so wonderful.
I am a fairly heavy sleeper, but I am not used to sleeping with someone, so it did register in my drowsy mind when my sister got up and left.
It wasn't enough to really draw me from the embrace of sleep, though I do recall cracking my eyes slightly open, so I could admire her gorgeous ass, as she walked out, naked as the day she was born.
My ass now.
That thought sent a spike of lust and satisfaction through me.
Sleep reclaimed me pretty fast.
What really woke me up, was the sensation of my sister getting back into bed.
Without a word, she straddled my naked body.
I peeked at her from almost closed lids, curious what she was up to.
She was mostly naked, except for a very sexy crimson lace bra. As she straddled me, she slid down a little, sliding my morning wood along the crack of her ass.
I could feel the warmth of her core against my cock, as she rubbed herself gently against my length.
I was pretty certain that she rubbed more than just her ass against me, leaving my cock slick from her juices, as she ground her forbidden flower against me.
Not daring to make a sound, hardly breathing, I just kept pretending to be asleep, while she had her way with me.
After about a minute of her grinding her sopping wet pussy against my morning wood, she was shuddering with lust. Pausing for a second, she apparently came to a decision, and with a soft grip of her feminine hand that I had never before felt on my cock, she aimed my shaft upward slightly, and scooted back, pushing herself against my hardness.
At first I was not entirely certain what hole she was trying to fill, and the very thought of my sister stuffing my cock into her delicious pussy, was almost enough to make me shoot my load. If not for the last few days numerous orgasms, I probably would have.
Her weight pushed against my cock, for a moment it was almost painful, then the incredible sensation of her flesh yielding to mine replaced the discomfort. The now familiar sensation of her fleshy ring gripping my rod so firmly replaced my uncertainty with the knowledge that I was inside her ass, which was completely fine.
How far I had come in just a few short days. Before I would have scoffed at the suggestion that I would ever fuck my sister, and have laughed my head off at the idea that I would be fucking her ass whenever I wanted to. And apparently whenever she felt like it too, from the looks of things.
Now it felt right and proper. The way the world was supposed to work. She was my sister, but she was also MINE. Well, quite a bit of her was mine, and I would do whatever I could to win the rest too.
Having taken all of me into her ass, she started sliding gently back and forth, moaning softly with the pleasure of it.
I gave up the pretense of sleeping, and instead looked up at her, admiring how amazing she looked, my lovely valkyrie. She was caressing her drooling pussy with one hand, sliding her fingers inside her folds, drawing circles around her clit, spreading her juices all over, making her sex glisten in the weak light of dawn that was seeping through the blinds.
The sight of her was intoxicating, and though I was almost afraid to break the spell, I could not resist touching her.
I let my hands slide up her firm thighs and cupped her ass, as she rode me slowly.
She smiled down at me, as she realized I was awake, and as I returned the smile, about to say something, probably some cocky remark, I was interrupted as she went into orgasm. Her hand rubbing furiously, as she collapsed down on top of me.
As she came, her ass milked me furiously, but I was not so easily pushed over the edge anymore.
Instead, as she came down from her orgasm, I started to gently push into her in a nice slow rhythm, that let me really enjoy the feeling of every little contraction of her ebbing orgasm.
When she had caught her breath, she sat back up and took charge once more. Riding me like a valkyrie cowgirl, this time more for my pleasure than for her own. She used long sensuous moves, and when she sensed I was about to cum, she sped up, until she was slamming down on me with all her weight again and again, as I shot the first load of the day straight into the depths of my gorgeous sister.
"Good morning little brother." My sister smiled at me.
"Good morning indeed, Kaitlyn, that was the best way to wake up ever, but uh, what was that about?" I said, as I beamed her a smile of my own.
"Just rubbing my ass against you, as you instructed. Thought I had better be thorough and make sure to also rub the inside of my ass against you, so figured that was the best way."
"Also, I have never had orgasms like this before, so I guess it's not so bad you are such a pervert."
"In fact, I think you are rubbing off on me, and I kinda like it." With a wink, she made sure to maintain eye contact as she licked clean her fingers that were sticky with her juices.
"Mmm... Good stuff."
"Anyway, we are going to have to split the chores today, we completely forgot to include them in our wagers last night. Probably for the best, seeing how badly I have been playing lately, I would be doing all of them."
It was hard paying attention to her words, as I was entranced by her licking her fingers clean like that. I would have loved to taste them. I would cum instantly, if I could just lick her pussy right here and now.
The idea made sure that I was no longer shrinking inside my sister.
Quite the opposite, in fact. I could feel my cock stirring, growing, hardening.
It seemed like she was aware of it too, as she started to move slowly back and forth, speeding up my return to full hardness.
She was smiling down at me, both hands on my chest, supporting some of her weight that way.
"You really are an insatiable sex best, aren't you?"
"Guilty as charged", I admitted.
Then deciding to take charge, I grabbed her by her waist, and rolled us over, so that I was on top of her. Sliding my arms under her knees, I grabbed her thighs, and with that leverage I could push myself deep inside of her, while pulling her tight.
At first I made sure to use long slow pushes, really grinding into every silken fold inside of her, then as I could sense my sister getting closer to another orgasm, I sped up, until I was fucking her hard and deep, while her fingers brushed against my cock through the thin wall of her vagina, as she fingered herself furiously.
As she came, so did I. Her contractions kept sending waves of orgasm rushing through me, and I am fairly certain Kaitlyn's nails left bloody stripes on my ass cheek, as she tried to pull all of me inside of her.
Then suddenly her hand was at my neck, pulling my head down, my face close to hers.
