Another way too long Shuttle Ride

Lwhekk was a planet located in the Ssi-ruuk Star Cluster far out in the Unknown Regions of the Galaxy. Naturally the flight would take quite some time, so as soon as Luke brought the shuttle into Hyperspace he went back into his own little chamber. Shortly after Leia and Mara followed his example and left as well.
Back in his chamber Luke sat in the floor and tried to meditate to let the time pass quicker. As he closed his eyes he let his mind wander, freeing it from all thoughts and emotions and creating a perfectly empty vessel for the ****. Suddenly images, visions began to flash before his eyes. He saw his sister, Leia. Her beautiful face, her big tits, her round and perfect ass. Another vision of his sister appeared to him. She was naked, with a full round belly, pregnant, carrying a baby in her womb. She looked happy. Instantly Luke knew it was his. Abruptly Luke was ripped out of his vision back into reality. It took him a few seconds to process what he just saw, but just as he came to his senses, he noticed a new problem. The area around his crotch was warm and sticky. It seems that apparently he unconsciously came into his pants during the vision.
Quickly Luke got rid of his dirty pants and retreated into the bathroom to clean himself, leaving his old clothes on his bed.

Leia cautiously knocked on the door to Luke's chamber. She had given a lot of thought to it and she decided that she wanted to apologize for being so harsh to Luke after their talk with Mon Mothma. She knew that she would've done the same if she was in his position. Maybe that was the reason why she was so harsh in the first place. She knocked again. But was left without an answer again. Having enough of this Leia just opened the door and walked straight into Luke's chamber.
She heard the water running from the bathroom. So that was why Luke hadn't answered. Just as she was about to go away and com back later. Luke's clothes laid careless on his bed. And there was some sort of liquid on his pants. Her curiosity got the better of her and Leia examined his pants. Was this... cum? She had never actually thought that Luke masturbated. She thought that was another weird Jedi rule. But there it was: Her brother's sperm. For a while Leia just stood there. Her head completely empty. But simultaneously a million thoughts ran through her mind. Almost automatically she extended her hand. Her body was doing things, but her mind was gone. She touched his cum. It was still warm. She dipped her finger into her brothers cum and moved it closer to her face to get a better look. It wasn't anything special, just regular semen. But something about it was just fascinating, she couldn't think about anything else right now. Absentmindedly she licked her fingers. She didn't know why, but for some reason it seemed like the best thing she ever tasted in her entire life. She savored every little droplet of it. Suddenly a shudder went through her body. Thousand electric signals firing at once. Her mind exploded. Did she just orgasm from eating her own twin brothers cum?
Upon realizing what she just did, Leia quickly fled the room, ashamed of herself.

Luke came out of the shower with nothing but a towel around his waist. While he put on some new clothes, he saw something strange at the back of his sight. The on the pants he left on his pants was strangely smeared. But doesn't recall ever touching it. Could it be that someone else had done that? But who?

Leia couldn't stop thinking about Luke's cum. About the intense pleasure she got from eating it. She had tried reading a holo-book to distract herself, but it didn't help at all. She needed more of it. It was the only thing that mattered to her at the moment. The pressure got too high to ignore it anymore. And Leia stood up, hoping that Luke would still be in the shower, so that she could eat it the rest of his delicious cum. Maybe then she would stop thinking about it. She opened her door and...

Luke's connection to his sister was always strong. But now it almost overwhelmed him. Something was occupying Leia's mind. Troubling her. He could sense it as if her feelings were his own. Immediately he went over to check on her. He left his room and walked across the corridor to Leia's chamber, swung the door open and... Leia was standing before him, just inches away, her hand still reached out for the door handle.

"L-Luke!", Leia exclaimed a bit too high pitched, "Wha- what are you doing here?"
"I was just checking on you. Are you alright?"
"Yeah, I'm... I'm fine. Thanks for checking on me.", Leia leaned widely on the door frame, essentially blocking Luke from seeing what was going on in her room.
That was when he noticed the wet spot in Leia's crotch. Not wanting to embarrass her any more, he hastily apologized for bothering her and left.
That was when he had the idea. In theory he should just be able to check the recordings the security camera in his room made. That way he would know what actually was going on with the cum on his pants.

When he arrived the cockpit, where all recordings of the security cameras were stored, he was met with a shocking sight. Mara was sitting there and watching a holo-vid of his sister sucking her finger in front of Luke's cum-stained pants. Slowly Mara turned around with a wide, almost idiotic grin on her face.
"Was that what you were looking for?", she asked, putting on an innocent face."
Luke couldn't help but stand still watch in shock. He opened his mouth to say something but then closed it again.
"Looks like she's quite enjoying herself. If didn't know better I'd say your sister's got the hots for you. But that can't be, right? A Jedi like you wouldn't engage in such dirty thinks like ****?"
"N-No you don't understand...", he tried to explain the situation.
"Oh, you don't have to lie to me, Luke. I don't care what you two do in your free time, to be honest I think it's kinda hot... Tell me what did you do already?"
"I... I... N-Nothing...", Luke was too stunned by the question to form a proper sentence.
"Luke, Luke, Luke. I can tell when you are lying. Don't worry I won't tell."
"What do you want?", Luke asked with a strong voice, finally regaining his composure.
"Me? I want nothing. I just want to help two lovers find each other, even though their love may be 'forbidden'."
"Are you blackmailing me?", he questioned.
"No. It's not blackmailing. Just... just think of it as owing me a favor.", Mara talked her way out of this.
"I don't have to to put up with this nonsense any longer.", said Luke and turned away.
"As you wish. But I may recommend visiting Leia on your way back..."
With these words Mara switched to the live security recordings in Leia's room, which showed her naked ande masturbating.