FORWARD: The following takes place three days after the events in part one.
ALL CHARACTERS ARE AT LEAST 18 YEARS OF AGE OR OLDER.
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I awoke to another beautiful morning of bright sunshine streaming in my window.
I'd been dreaming, as I had the previous three nights, about my little sister, Mia, in a way a brother really shouldn't. The memory of it was already fading, just hazy images now, but enough that the erection I'd woken up with showed no signs of subsiding.
I couldn't stop thinking about how I'd cum on her face a few nights ago. The image of it haunted my mind with a mix of lust and revulsion. The lust was directed towards Mia, the former mousy bookworm who had now blossomed into a beautiful, sexy young woman. The revulsion was directed at myself for lusting after my sister.
She hadn't asked for another "treatment" since that night, and despite my constant dwelling on those sinful events, (Mia's breasts heaving with excitement as my white hot spunk shot out of my cock, splattering her adorable, innocent face,) I hadn't masturbated since.
Believe me I wanted to, desperately. But part of me felt guilty, because I knew there was no way I could jerk off without thinking about Mia. MY SISTER.
But the true reason I was waiting filled me with even more guilt: I was hoping Mia would ask me to cum on her face again soon.
She'd made absolutely no mention of it the past few days, leaving me conflicted as to what, if anything, to do.
So I lay there in bed, my cock begging for attention that I refused to give it. I decided I needed to get up and find something else to occupy my mind. Maybe a good workout would clear my head.
I was just about to get out of bed when there was a knock on my door. "Mike? You up yet?" Mia called out.
I quickly threw the sheet back over my naked body. "Yeah, I'm up." I hesitated for a moment, trying to stem both my excitement and my fear, before continuing, "You can come in."
Mia burst through the door excitedly, and my eyes went wide with surprise.
She was again wearing a bikini, a white one this time. It was even smaller than the yellow one she'd worn a few days ago. The thin patches over her breasts barely covered her puffy nipples, and while I hadn't seen the back yet, I was pretty sure the bottoms were a thong. Her most intimate area was barely concealed beneath a tiny triangle of fabric that was snug enough to highlight her plump mound and deep cleft.
I groaned inwardly. This wasn't helping things at all. "Jesus, Mia, couldn't you find a suit that fit you? Mom and Dad would kill you if they saw you in that!"
Mia laughed. "They won't. Got this while at college. I wanna work on my tan today. The sun really helps my skin, too, along with, well, you know," she grinned sheepishly.
Mia sat down on the edge of my bed. Her revealing bikini was pure torture. I had to shift my legs to a knees bent position to keep Mia from being able to spot my raging erection under it. Although for a moment I wondered why I'd bothered; she'd already seen it in all it's glory not long ago. Old habits I guess.
"So what did you come in here for?" I asked, trying my best not to stare at her all but naked body.
"Well, first, to thank you for...helping me. Look," she beamed, pointing to her face, "almost cleared up!"
She was right. The angry red blemishes she'd shown me the other day were all but faded from view. Her face was radiant, almost glowing.
"And second," she continued, "I want you to come spend time with me by the pool. It's a beautiful day, too nice to spend it in the house!"
"Okay, okay, just...give me a few minutes to wake up, will ya?"
"You need to wake up? I can wake you up," Mia giggled. Suddenly she pounced on top of me and started tickling.
It was a game we used to play all the time as kids. Sometimes she'd start it, sometimes I would. But once begun, the rules were simple: we'd wrestle and tickle each other mercilessly, and whoever begged off first was the loser.
"Mia, stop!" I protested. "Don't you think we're a little old for..."
I was cut short as Mia reached under my bed sheet in an attempt to tickle my stomach, a spot she knew was sensitive. Her hand went too low, and instead of finding my belly button, her fingers instead brushed along the tip of my cock, which was pointing straight up like an arrow.
Mia pulled her hand back reflexively. Her laughter stopped as her wide eyes met mine. "Sorry," she blushed.
Something in her face told me she wasn't that sorry. Or maybe I was just imagining things.
"It's...okay," I said softly. "But maybe you should go and let me get dressed. I'll be down in a few minutes, okay?"
Mia smiled and hopped off of me. "Okay," she said. She was about to go, then stopped, looking at me.
"You...you're not planning on...you know, taking care of that...now...are you?" she stammered.
"No," I said, defensively.
"Good," she smiled shyly. "Because I was hoping for another...treatment...later."
This was crazy. My little sister was standing in front of me, almost naked, asking me not to jack off now because she wanted me to cum on her face later. How was I even supposed to handle this???
"Just go," I said, "before I can't control myself."
Mia nodded and headed for the door. On her way out, I got a good look at the back of her suit. It was indeed a thong, the spaghetti thin strip buried so deep in the crack of her incredibly round ass she may as well have been nude.
I waited until I heard Mia's feet headed down the stairs to jump out of bed and race to the bathroom, my cock bouncing with each step.
I jumped in the shower and turned on the cold water, the icy blast of it shocking my body, which instinctively tried to step away. But I held my position and let the freezing water wash over me until I finally felt my lust subside and my cock begin to deflate.
Still, I felt swollen and aroused as I put my swimsuit on, but at least now I wouldn't be pitching a full tent in it.
I went downstairs and made myself a cup of coffee and a bagel, then stepped out onto the patio and into the warm summer sun to join Mia, who was already swimming in our in-ground pool.
I sat down in a patio chair next to the one Mia had her towel on and sipped my coffee. My dark mood lightened while I watched my sister swim.
It had been a long time since I'd seen her this carefree and happy. As I finished my simple breakfast, I reflected on the fact that what we'd done that night, no matter how immoral most might think it was, had helped her achieve this joyful state. So how wrong could it be?
Mia swam over to the edge of the pool. "You're not coming in?"
"Maybe later, just ate," I said, swallowing my last sip of coffee.
Mia climbed up the ladder, and as she stepped out of the pool, my eyes drank her in.
Her dark, wet hair was swept back over her head, and her make-up free face beamed happily. Her bikini, thin as it already was, had become almost invisible from being wet. Her nipples, stiff and hard, were clearly visible under their tiny triangles, as was her clearly bald pussy.
I wanted to tease her for wearing such a revealing suit. I wanted to chide her being almost naked in front of her own brother. I wanted to tell her how beautiful and sexy she was. But I didn't trust my tongue to say any of those things.
Instead I watched silently as she sat down on the lounge chair next to me and began applying suntan lotion, starting at her neck and shoulders, then down across her chest. I had to look away as her hands moved into her cleavage, causing her firm breasts to jiggle with her movements.
I wished I'd have remembered to bring out my phone, or a book, or anything to distract me from the not so innocent show my sister was putting on beside me.
I risked another glance to catch Mia now standing, her back to me. I watched hypnotized as she lifted one foot onto her chair, then bent over to apply the lotion to her leg.
Her ass was completely exposed save for the string running down the middle. The tiny triangle it ended at barely covered her vulva. I could see peeks of pink, plump flesh pushing their way out of each side. The still damp cloth did nothing to hide the outline of her slit or her jutting clitoral hood.
Mia shifted to her other other leg, and now her puckered little butthole was also visible, appearing to wink at me as her body bent and moved.
I averted my eyes as she straightened up, and had to clamp my legs together to hide the erection that had sprung up in my shorts.
But Mia had caught me looking. "Didn't mom teach you it's not polite to stare?" she joked.
I flushed furiously. "Well, Jesus, Mia, what do you expect? You're practically naked!"
"Oh come on," she sighed. "You've seen me naked before. We used to skinny dip out here all the time when we were little."
"Yeah, but that was a long time ago. Things are very...different," I said.
Mia just shrugged and smiled. Then she lay down on her lounge chair, face down. "Would you put some lotion on my back for me?" she asked casually, as if having her older brother rub lotion on her almost naked body was normal.
It wasn't normal. Not in the least. But that didn't stop me from doing it.
Her head was turned to the side so she thankfully couldn't see my erection as I stood from my chair, then dropped to my knees by her side.
I poured the oil generously along her back, and had just begun to rub it into her smooth, warm skin when she stopped me. "Hold up a second," she said as her arm reached around her back to untie the string holding her bikini top on. "Don't want the tan line," she explained.
My hands continued their journey along her back, spreading the lotion across her shoulder blades and down along her spine, pausing just above her ass.
"Why'd you stop?" Mia asked. "I don't want a sunburn there! Keep going. You know you want to." She wiggled her butt encouragingly.