I can still remember the night I got the call.
My sister was in town, she was crying on the phone because her fiancΓ© had just left her for a woman he had met on some 'retreat'. After crying for several hours she said she was going to be staying some local hotel to which I told her no way. She would come and stay with her big brother.
Although only 27 and moderately paid my house is nice, I bought as a steal from a couple going through divorce who just wanted to get rid of their 'party' house and split the cash. The house has a bar with game room (they included the pool table, and I keep the bar stocked). There are three bedrooms, massive master bedroom bathroom... more than enough room for a bachelor, but great for parties.
Another fifteen minutes later my sister is at the door and collapsing in my arms in tears. She's very slight, 5'4 weighing 105 pounds at most, so I easily picked her up and carried her to one of my spare bedrooms.
I let her cry herself out on my shoulder and then I told her to get some sleep.
The next morning, in fact the next five days she barely said a word, just moped from the bedroom to the bathroom, eating what I gave her, and crying in privacy till she fell asleep.
I let her, figuring she'd snap out of the depression herself, and sure enough day six she seemed more herself.
That evening's dinner she prepared along with some wine she chose from my bar. After the first bottle she continued having drinks until she was quite drunk.
She verbally abused her ex, describing horrid tortures she'd wish he'd suffer for over an hour before she noticed that wasn't paying that much attention.
"I'm sorry!" she said sounding overly apologetic. " I'm boring you, I'm such a stupid boring bitch!"
"No you are not, you are drunk, and angry, and you have every right to be." I said reasonable from the couch in the bar area.
"I drove him away by being such a self involved bitch." She said bitterly and angrily.
"I doubt it, he's just screwed up in the head."
"You think so? Maybe I wasn't pretty enough."
"Not likely." I responded with a snort of derision. Blonde, athletic and thin, impish face, blue eyes, B sized breasts and small round ass, what guy wouldn't find that pretty enough?
"Oh yeah? You think your little sister is hot?" She asked as she began a drunken stumbly sultry walk in my direction.
"You're my sister." I stated. " But other than that, any guy would be lucky to have you."
My sister got to the couch and collapsed against me, sliding her body along mine that forced my cock to respond instinctively. Of course my sister placed her hand against it to up right herself.
"I don't think it matters that I'm your sister." She said with a devilish grin as she began to stoke my hard-on through my pants.
"Don't do that!" I said as I pushed her hand off.
"Why not? You liked it." She stated.
"You are my sister." I said firmly, " Cum'mon, time for bed."
"Cum on what?" She asked coyly, " Got do more than that to make your little sister cum."
"That is not what I meant and you know it." I said now almost angry in frustration.
"Don't be mad at me." She said suddenly giving me puppy eyes. " I'll be good."
"I'm not mad, here put your arms around my neck so I can carry you upstairs to bed."
My sister put her arms around my neck and I lifted her up with no further protest. I carried her to her room and laid her in the bed. She almost immediately rolled over and fell asleep.
I walked to my own room, got ready for bed, and closed my eyes trying to get the image of my sister doing obscene things out of my head. Some how I finally managed to fall asleep.
I woke up feeling soft lips on my hard cock, in a semi-dark room. Not really thinking about whom it must be I simply ran my fingers through the girl's hair and as her tongue tease me I approached my orgasm. Sensing my urgency she slid till just the head of my cock was in her mouth. I shot my load into that welcoming mouth with a relief of a hundred orgasms. As I slowly came down from my high and the mouth continued to suck the last of my seed from my cock my mind began to wake up and with a start I realized what had happened.
I threw back to sheets to see my sister's eyes staring up at me, her mouth smiling around my cock. With a final lick she released my cock from her mouth and crawled up to lay on my shoulder.
"You like it?" She asked.
Caught off guard by the innocence of the question I answered honestly, " Yes."
"Good, so did I." She said as she snuggled against me.
"But you are my sister." I said quietly.
"Shhhh.... We'll discuss it in the morning. I'm tired."
That seemed to be the end of the discussion for now. Despite the guilt and confusion swirling in my head, due to drowsy from being completely sated, I drifted back into sleep.
I woke that morning to another blowjob, this one I realized who it was immediately and I did nothing to stop it, I just looked down into my sister's eyes and enjoyed the sensations her mouth was providing me.
Seeing me awake she rotated herself around so that she was straddling my face. Knowing it wasn't polite to receive and not give please I put my tongue to work on my sister's delicate flower.
I let my tongue glide along her outer lips, and then I slipped just the tip of my tongue into her flaps of love where I collected my first taste of her. She was sweet; my sister always ate a lot of fruit and the sugars showed in her taste. I let my tongue ever deeper into her, but slowly so that by the moment I reached her button she was trying to grind into my tongue.
When I let my tongue stroke her clit finally she came with scream muffled by my cock. I just let my tongue sit on her clit as her body shook on top of me.