Time to rub one out.....

Meanwhile, back in the lab, the ship's computers began to display the initial results of Adam's 'examination' on the wall monitor. Data began to appear and several red bars flashed with warnings about the detection of Gorgon DNA and the hazards to humans, especially human females.

Back inside the showers Adam smiled under the warm jet spray as he turned his back towards Cindi.

"Mmmm Adam you really must have been working out alot." his sister told him as she picked up a sponge and began to rub it over his muscular back, "I don't remember you being so...so ripped."

"Well I have a lot of free time on the Falcon 4 you know." Adam said as he felt the soapy sponge moving over his shoulder blades.

Cindi just smiled as she took in her brother's broad shoulders, muscular arms, powerful legs and tight ass. He looked like a Greek God to her as she lathered him up.

It didn't take long for the busty teen to move the sponge even lower down Adam's back. A rich lather ran down over his butt and down each leg.

"Mmmm yummy." she thought as she put down the sponge and began to work the lather over her brother's backside with her hands.

Adam was thrilled to feel his lil' sister massaging and working him over.

"That feels really good." he said enjoying the feeling of her hands as his thick dick got even harder.

"I bet I know what else would feel good big brother." Cindi whispered as she leaned forward against him and wrapped her arms around his body.

Adam groaned as he now felt his sister's massive breasts pressing up agasint his back as she ran her hands over his muscular chest.

"Oh gosh Adam you feel so good." she said as her hands traveled down over his well defined abs.

"Cin I don't know how much more I can take..." he said as if to warn her.

"Just relax bro." she said into his ear as she gently kissed his neck, "Let me take care of you...make you safe."

Adam gasped as he felt Cindi's hand move down and wrap around his throbbing boner.

"Oh my big brother....." Cindi said as her fingers slid slowly up and down his length, "you really are my BIG brother!"

Cindi Carter had never felt a real cock before and never imagined one as big as her brother was sporting right now. She knew it wasn't proper to be showering with her own brother in his aroused state but figured she 'could kill two birds with one stone' if she stroked him to orgasm. For one thing, from her biology courses, she knew that after he came he would be 'safe' for a while. For the second she really wanted to feel her brother's huge cock as much as she could. Her simple plan would accomplish both her goals she thought.

She also realized that it probably wasn't a good idea to keep teasing her brother anymore. The risks of having unprotected sex, expecially with her own brother was very great. Worse yet she was at the peak of her fertility and certainly didn't want to have any 'accidents'. It would be very hard to explain how she got knocked up while being alone for three months in deep space.

"Oh my goodness, you're really HUGE!" Cindi gasped as her hand moved back and forth along his rigid dick giving him an incredible hand job.

Massive amounts of precum was already leaking from the tip of Adam's blood engorged fuck pole as his little sister continued stroking his meat.

"I...I can't...hold out much longer..." he admitted as his breathing increased.

"It's OK just let it go." she reassured him still completely unaware of the Gorgon DNA's influence on him.

Suddenly Cindi moved her other hand down along Adam's butt crack and between his legs.

"W-what are you..." Adam began to ask as his sister reached up and gently began to cup his ballsack in her other hand.

"Oh...My...God!" the innocent teen said as she began to massage her brother's massive ball sack with one hand will jerking him off with the other. His sack felt like he had two pool balls inside it she thought.

Adam felt the pressure growing inside his nuts as he spat out, "I'm gonna...'pant'...gonna...'pant'....CUM!!!!!!!!!!!!!!!!!!!!!!!!!!!"

In an instant a stream of hot fluid shot out from the tip of Adam's huge rod, spraying out his seed all over the side of the shower stall and running down into the drain at their feet.

"AAAAAAAAAAAAAAAA!!!!!!!!!!!!!" Adam yelled as he came all over the shower wall with his sister trying to milk him for all she was worth.

"That's it big brother cum for me. Cum for your little sister." she said trying to get every last drop of cum out of him.

After what seemed like quite a while Adam was finally spent as his cock began to soften a little.

"Thank goodness." Cindi thought as she relaxed her grip on his dick, "I can't believe how much he came. He must have been building that up for a while. At least he's 'safe' now and I don't have to worry about things going too far or getting pregnant now."

Unfortunately, Cindi had no idea that it wouldn't take very long for her brother to recover and be ready for another round.

"Oh gosh Cindi that was...that was really amazing, thank you so much. I really needed that. You were amazing." he told her.

"You're welcome mmmfffff." she said with a smile as he turned towards her and kissed her directly on the lips. The kiss wasn't a normal 'brother-sister' kiss but a very passionate kiss as their tongues explored each others mouths. Cindi didn't pull away either as she actually enjoyed the feelings her brother was giving her.

"Why don't we go to your cabin and I can give you a massage and return the favor." Adam suggested as his mouth finally moved from hers.

Cindi's nipples were rock hard and her pussy was dripping wet after the passionate kiss she just got. She really needed to get off.

"Well why not?" Cindi asked herself. She reminded herself that she just helped her brother get off and turn about was only fair play. Besides she thought, he was her brother and he certainly wouldn't let things get out of hand...

"Ok. Lets go." she said as she shut off the water and stepped out of the showers and into the locker room to dry off.

As they toweled off Cinid was amazed to see that her brother still seemed semi-hard. "No it can't be." she told herself as she remembered her biology lessons, "It'll be a little bit before he can cum again. It's OK."

Once they were dry Cindi slipped back on her black pumps and picked up her little bodysuit and glasses. She really didn't want to walk on the ship's cold floor without any shoes but didn't mind being naked in front of her brother.

Adam tossed his towel into a chute along with Cindi's. His clothes were still in the lab and he didn't mind being naked at all.

"This way." she said as she led Adam out of the locker room and down the corridor.

"Click. Click. Click." Cindi's heels echoed down the passageway as she led her brother to her cabin. All Adam could do was smile as he admired his sister's cock stirring body wearing nothing but the sexy heels.

"Well here it is." she said opening the door and stepping inside, "Welcome to my humble home. Excuse the mess."

Adam stepped inside after her and shut the door behind them.

Cindi's cabin looked like a standard crew cabin with a few pictures hanging on the walls. The bed was a mess and clothes seemed to litter the floor.

"Oh. Sorry about this..." Cindi gasped as she headed towards a large poster of a muscular man on the wall wearing just a pair of tight speedo style breifs. She quickly pulled it down, as if embarrassed her brother would see it and rolled it up.

Adam just smiled as he realized his build was much more impressive than the man in the poster.

"Have a seat." Cindi said motioning over to her bed.

Adam's foot kicked something and he looked down to see a sexy baby doll nightie on the floor at his feet. He stepped over it and sat on the side of his sister's bed. As he did he reached down and picked up a sheer black g-string panty and dangled it off his finger.

"Opps sorry I wasn't expecting guests." Cindi said snatching the tiny item from her brother's hand and tossed it across the room.

Adam smiled as he looked over his baby sister''s voluptuous body. He admired her firm 34DD's, tight tummy, toned legs and shaved pussy as he checked her out. Blood was once again flowing back into his cock.

"Why don't you lie down and I'll give you a massage." he said as he stood up.

"Ok." Cindi said with a sweet smile as she pulled her covers aside and laid out on her stomach adding, "Give me a good one."

Of course a massage was only the begining of what Adam had planned to give her.........

What's next for the horny siblings?