I know a boy shouldn’t think of his sister as a woman, much less fuck her, but how many guys come home to find their sisters on all four, blowing a guy while another fucks her from behind?

Leslie’s a year younger than me, so, only nineteen years old, and she’s, frankly, a fucking awesome body. I mean, he’s got big, tall, long prefected legs and an ass that every guy in our high school wanted.

When I arrived early from work last week I came in the back door and took a beer from the fridge. I just woke her up when I heard her voice screaming from the living room.

“Oh fuck! Stronger!” cried his voice. Yes!

I woke up and moved to the hallway, then looked around the corner in the living room. There was Leslie, her long hair wrapped around the fist of a very large and muscular naked man at least ten years older than her. Her lips were wrapped around the boy’s cock while she boiled them.

Her breasts were swinging back and forth below her as she knelt there, and another great muscle guy was giving her from behind, her hips smacking in her butt cheeks as he rides her. I looked in amazing astonishing as he slipped one of his hands on his body, then grabbed one of his breasts, crushing it tightly.

Okay, it was my sister, but my dick came up in an instant while I relaxed and looked.

“Yes. Suck it, honey, one of the boys grew up.

“Tight pussy,” the one behind his gas.

Then he gave a hard stroke and stopped, hands on my sister’s back while breathing.

Leslie took her lips off the other guy’s dick and turned around, smearing her legs while she moved in and coming home.

He fucked so strong that he was actually driving her through the floor, his hips banging up the cheeks of the upside down ass and masturbating her forward on her hands with every blow.

Leslie masturbated her head and her eyes closed while she took it, then she started throwing her head up and down, and her mouth opened up as she burst into the air. Then she began to cry in pleasure, sharp little yaps at first, then long curses of pleasure as she came, her voice rising in a scream like the boy plagued her flesh in her furiously.

She fell forward on her elbows, then her shoulders as the climax passed, and the boy, having come as well, softened on her heels. I came back out and waited for a few minutes for the boys to leave, feeling too horny for my slut sister to be mad at them to ride her like they did.

I went to the front door while Leslie pulled a short dress around herself. He whipped me and looked at me in a guilty way as he tied the belt around his narrow life.

“What’s wrong with you?” I asked.

“Nothing wrong? Why?

“Are you in your dress so late? "

“I was changing.”

I looked up and down, noting his red skin and sweat shine on the forehead, then laughed.

“What’s so funny?” he asked.

“You have some courage on your cheek,” I said with a smirk.

Her jaw fell and rose automatically, then dazzled me.

“It’s changing, huh? I saw those two boys leave. "

“What guys? "

“Okay, I’m wrong. You know how you wanted my room? If you open that dress and wear something under you, I’ll give it to you. "

“Just because I have nothing down here doesn’t mean… "

“Okay, if your pussy doesn’t have cream, you can have my room. "

He was spoiling me, then he sipped and threw his eyes. “You want to tell Mom and Dad? "

“No.”

He looked down at me and saw the swelling in his pants, then a little dismayed. “The thought you obscure me turns you into a big brother? "

“Not as much as the sight of you sucking a guy while the other one fucked you a couple of minutes ago. "

He reddened and opened his mouth.

“Yes, I came to the back.

“I hope you have an eye!” she died.

“I’m sorry,” I said. “But you should put a sign on the door or something. Fuck, don’t come in. "

His face was the red beet, and I got hurt.

“You look beautiful,” I said. “Unbelievably hot and sexy. "

Really? He looked at my horse again, then on me.

“Oh yes. I wanted to come in and join them. "

He grinned, then he got ahead and grabbed my dick through my jeans. She grew up under her hand and smiled at me. “Well, no one’s stopping you, big brother. "

She untied her robe and ripped her, letting me drink to the sight of her sexy and sexy body while she rubbed my dick. He threw out my jeans when I got here and pressed her breasts, then pushed them down and pulled my dick free.

She retreated on her knees in front of me, and there, licking her fucking head, then taking her to her mouth. I couldn’t do a fucking thing, but stand there and moan and run my fingers through her hair while her lips boiled on my burning tool.

She retired and looked at me. “There’s something I wanted those guys not to do,” he said, pumping my hand on my dick now slick. “I wanted them to fuck me in the ass, but they just wanted my pussy. "

I fixed her in shock when she let go of my dick then turned and dropped on all four. He lowered his upper body behind him, then he reached back with both hands and grabbed his buttocks, pulling them off.

“You can fuck me while he’s in the ass, Mark,” he slipped.

Well, Christ, I certainly wouldn’t have refused. I was on my knees behind her in an instant and rubbing my cock softened saliva against that little wrinkled hole.

I fucked slowly, pushing my way through her tight rectum as my hands ran on her body. I sank my fingers deep into her titty meat, grinding and grinding it into delight as she moaned and concentrated on keeping her locking sphincter down.

Then my hips were reddened with his soft ass skin and pushed on all four, rubbing his ass back against me and moaning in joy.

“God feels good there!” he complained. “I never had a dick on my ass!”

“You have a gorgeous ass,” I whispered, squeezing my breasts as I started pumping.

She started singing against me in tandem, and I immediately learned that Leslie was not a girl for sweet and sweet love. He wanted it hard, fast and bad, and he cursed me until I started welcoming it.

Soon my hips slammed into a pair of soft cheeks that were still red from the slap that the other two boys had given them, and my dick was fond of back and forth through my sister’s ass as I beat my meat inside her.

Fuck my ass! “Fuck my ass!” gassed with every breath, saying it’s like a mantra while he banged his butt to meet every push.

Then he stopped talking completely, just grunting like an animal while riding it. I grabbed her hair like one of the other guys had done, scraping it back, holding it in both hands as the reins of a witty filler as my dick swept its hot, little bitch.

She started braking and moaning and then screaming in pleasure while she came, her head back, her asshole sucking like a mouth on my dick as I continued to hammer at home. It was too much for me and I exploded inside her, washing my guts with my sperm while she drank everything.

We’ve fucked twice since then, once in the pussy and the second time on the ass again, and although it’s a bit weird to fuck my sister I can’t say I’m not having fun.