Onboard the Ghost with his Mother.
From Create Your Own Story
Hera and Jacen had been on the ghost for weeks, attending to different matters across the Galaxy. Though they would visit some nice planets and space stations where staff had prepared rooms for them, Hera opted every time to leave as soon as each task was complete. Jacen's mother never liked to stay off her ship for long.
He had grown tired of the hard mattresses, the stale food, but most of all, he hadn't been able to masturbate in nearly a week. There was hardly a moment where his mother wasn't in the room, and, since they slept in shifts, he always had to pilot the ship while she was resting.
The two of them sat in their seats as the ship whizzed through hyperspace. Hera slowly stood up, stretching.
Hera: Well, your Mom's sweaty and gross, Jacen. I'm gonna try and sneak in a quick shower.
Jacen: K mom.
Hera: The ship's on course and it'll be at least 8 hours still until we reach Coruscant, so you shouldn't have much to do. That doesn't mean you can leave the cockpit, however.
Jacen: Yes ma'am.
Hera walked out of the cockpit.
Jacen sits for a moment, staring around him trying to stave off boredom, but soon enough he's unable to stave off horniness. At his age, he couldn't wait any longer for release.
Reaching into his pants, he pulls out his cock and starts to pump it.
He continues for a minute as he looks around, unsuccessfully searching for a means of mental stimulation. That's when he heard the shower start running.
He knew it was wrong, but Jacen couldn't help but picture his mom undressing in the bathroom, the water running down her smooth, green skin. He starts stroking harder as he thinks of her, and looks behind him at the door, contemplating. The lust takes over his brain and he decides to stand up.
He walks through the corridors of the ship with his penis still exposed, being extra careful as he descends the ladder.
Finally he makes it to the bathroom door. He opens it slowly, peering through the crack.
Hera scrubs herself unaware in the shower. Jacen takes in his mother's beauty. The shield between them was somewhat translucent, but he could still make out most of her features. Specifically her chest.
Jacen had never met someone with boobs as big as his mom's. They were one of her best attributes, along with her nice, round ass.
His mind goes aflutter with ideas.