Middle of the night

Sister wakes up brother and he enjoys the company.

Half awake, eyes still closed, Mark breathes heavily. In a semi-sleepy stupor the grip of something warm and wet engulfs his 5 inch teen cock. Mark is 15 but has the build of a 20 year old. He has been first in state wreslting for two years now so his build is athletic and strong. Suddenly becoming completely aware his cock is rock hard and in the darkness a small blonde haired head is bobbing up and down on his member. The sound of slurping and gentle moaning. Reaching down and grabbing the girl by the head and gripping a tuff of hair in his stong hands she freezes mouth in mid suction. With a pop her mouth releases and the room becomes silent.

Why did you stop? Marks voice cuts the silence.

A small meek voice of his older sister whispers. I thought you were sleeping.

Jenny is 17 but she is about half Marks size. Petit and thin. She is considered one of the geeky girls. If it weren't for Mark, no one at school would even know of her existence. She is very cute however and if she ever hits a glow up she would be hot as hell.

Realizing it is Jenny who was sucking his cock, Mark grips her hair tight and guides her head back toward his loins. Without anymore words her lips fish for the head of his cock and it slides it smooth, warm, and wet. Mark lets out a moan as he feels the blowjob get more intense.

Jenny wraps her meek little hand around half of his shaft and strokes it as she takes as much into her throat as she can. Only a few inches make it in and it hits the back of her neck. She swallows trying not to gag. Marks shoves harder and she swallows at the same time. Like a barrier releasing his cock slides into her esophagus. When he pulls back out she is gasping for air in the darkness. He can see her face but he can feel her gagging and the tears dripping down her cheeks.

You suck dick so good Jenny. You will have to do this more often. With a gentle nod she engulfs half of his shaft. The precum dripping from his head begins to taste salty on her tongue. He grinds his hips into her face and handles her head roughly like a fuck toy. Her hands grab at his hips and hold onto his boxers. The slobbery drip of saliva creates a dampness on the front of his boxers.

Jenny, I'm close to cumming he grunts. Don't stop sucking. Be a good girl and swallow my load.

She sucks more earnestly and braces herself for the inevitable. Suddenly Marks legs stiffen. His hips arch off the bed. The grip in her hair holds tight and he shoves his cock deep as he can and then a flood of cum spurts out. Jenny gags and coughs suddenly as cum sprays out of her nose. He doesn't care and continues holding. With another grunt another warm gush of cum flows out of her mouth and down his shaft. She closes her lips tight trying not to lose any. When he finally relaxes and her mouth pops off again. She rolls the bitter salty slime in her mouth and then in one gulp swallows the load.

He finally release her hair and his hands become soft again. Come up here and kiss me he gives command.

She crawls obediently toward his face. Laying next to him her face catches a glimps of light from the hallway. Her face is red and her eyes puffy and teary. She opens her lips and kisses Mark with a type of passion that should not exsist between a brother and sister. Mark grabs her by her throat gently as he kisses her back passionately.

You need to get back to your room before you get in trouble. Ok, she whispers, and with one more gentle kiss slips silently out of his bed and disappears down the hall with pitter patter footsteps.

Laying back in the darkness and contemplating this event, Mark thinks I wonder why she started sucking my dick, that has never happened before?