He hefted his massive cock, bringing the swollen mushroom head to rest on Alyssa's wonderfully soft Lips. Her tongue snaked out, Licking daintily at the tip, leaving him glistening in its wake. He saw her chest rise, her lungs filling with air as she took a deep breath, before she opened her mouth wider and engulfed the throbbing head of his dick. John leaned over the girl, placing his hands on either side of her torso, his body dwarfing hers.

The urge to thrust forward was irresistible and his hips pushed forward. His mighty cock slid smoothly to the back of Alyssa's mouth, before finding the familiar entrance to her throat. He stopped to savour the warmth of her hot Little mouth surrounding him, as she sucked eagerly, beckoning him deeper. Taking the hint, he drove forward, impaling the teenagers welcoming body until his balls rested over her nose. It was fascinating to watch her slim neck bulge outwards as his invading tool forced her tight throat to accommodate his girth.

"Ahh!" he gasped in relief, feeling the warm, snug grip as he was embedded to his full Length again.

"Mmm!" Alyssa moaned contentedly, the vibrations feeling incredible as she sucked him, with him resting deep in her gullet.

His balls ached for release and he could feel them trembling with anticipation. He slowly and cautiously withdrew the entirety of his male sword from its female sheath, until the head cleared the wanton teens lips. He paused for a moment, his heavy tool throbbing forebodingly above the teenagers head as she leaned up to plant soft sensuous kisses along his shaft.

Alyssa's mouth opened into that inviting oval for him again and he took up that invitation, gliding into her proffered throat with one Long, satisfying thrust. He began to drive his cock into her encouraging and welcoming mouth, truly face fucking the beautiful girl for the first time.

Alyssa revelled in being pinned to the bed under him as he pounded her mouth and throat. She used her Lips to maintain a tight seal around him and sucked encouragingly whenever he paused in his smooth thrusting action. She Looked up at his four swollen balls as they swayed back and forth above her face. Soon their contents would be blasting into her slim young belly, forcing her body to expand and house their delicious cream. She could hardly wait.

John drove forward again and again, his breathing becoming Laboured as he got closer to his peak. He pulled out completely so that Alyssa could breathe, but she grabbed his ass and pulled him back into her enticing throat. Her clear excitement and Lust triggered his climax and his body spasmed powerfully as his balls raised up to deliver their cargo.

He bellowed with relief as the orgasm washed over him, thick heavy spunk blasting out of his cock to fill the waiting girl below him. He could only stare starry eyed at her rapidly moving throat, as she sucked eagerly to get every last drop of his cum. Surge after surge of semen filled the young girl's stomach as her tummy desperately tried to house the warm, heavy meal. John watched in awe as her belly rounded out and rapidly inflated as he unloaded his spunk into her.

“Mmmph!" Alyssa moaned out her own orgasm as her thighs trembled in time with John's.

The powerful pulses of cum eventually subsided and John pulled his spent cock from the girl's lovely lips. He pitched forward and collapsed on the bed to her side as he laboured for breath. Alyssa bathed in the afterglow of her orgasm and stroked her swollen midriff contentedly, loving the fantastically full feeling. She covered John with the sheet where he lay comatose on the bed and snuggled in behind him, hugging the broad expanse of his back. She sighed happily as she waited for him to return to the land of the Living.

John gradually recovered from the explosive orgasm, his balls feeling satisfyingly numb after energetically delivering their load. He turned to face Alyssa, where she was Lying behind him and kissed her softly.

"That was amazing!" he thanked her appreciatively. Alyssa returned his kiss, then rubbed the tip of her nose against his in an eskimo kiss, before smiling broadly.

“Help me up would you handsome?" the teenager requested holding out one of her hands, while the other rested on top of her sperm bloated belly.

“Sure thing, beautiful," John replied, as he gallantly took her hand, assisting the unbalanced girl to her feet.

Alyssa looked hesitant for a moment.

“Is it okay if I continue learning about astro-navigation?" she asked shyly.

30 right ahead," John answered, pleased that she was so keen to learn.

“Just Let me know if you see anything on the long range scanner.”

His enthusiastic student nodded eagerly and set off to the cockpit, humming happily to herself. John worked through a mental checklist of maintenance chores that needed completing, before coming up with a number of tasks that would keep him busy for a few hours.

This developed into a pattern for the next week, with John working on various jobs around the ship, while his young guest spent her hours learning as much as she could absorb. They met up regularly for mealtimes before he would send her on her way with a nicely rounded out tummy.

John woke on one particular morning, slowly opening his eyes to see Alyssa's excited face watching him closely.