Tentacle Monster

Happy spooky month :D Enjoy the blurb!

Pascal whined as the head of the tentacle floated up infront of him. He knew it had no eyes, but it was like it was studying him. The best he could compare it with was a lamprey, but this was so much more advanced. It lowered itself to his chubby belly, leering silently at it. The ones holding him in place moved him forward a bit, and the tooth-lined head suddenly shot forward and stuck itself in. 

The dog let out a little yelp as he felt the teeth grab into his fur, and then yelped again as something sharp punctured his navel. But this feeling was quickly gone... perhaps the saliva of the creature had evolved to overcome this pain because soon all he felt was a pleasant sensation in his groin and a warmth in his tummy. 

But then he saw the tentacle bulge, and that bulge traveled down the length. He let out a little whimper, but there was nothing he could do. The bulge reached the mouth and squeezed through the opening in his navel. 

"MMMF!"

Suddenly the shape bulged his belly outwards. He could only assume some sort of egg had just been placed in him. Looking up he noticed the train of them following quickly behind. Egg after egg pressed against his navel and pushed through. His belly grew and grew, it became round and taut with the smooth shelled spawn being forced into him. He began to stretch more than he expected, but this stretching caused the middle of his belly to turn a deep shade of pink as things were pushed to their limits. 

Pascal let out a pitiful whine as the latest egg actually struggled to enter his belly, but with a forceful shove it too entered. Now his tummy groaned in protest. His fur creaked and the eggs within shifted around. He couldn't see anymore coming though, it looked like he'd made it through for now. 

The tentacle began to pull back, tugging on his fur and wiggling about. Pascal's manhood bounced at this, the stimulation was so sudden. He could feel his swollen knot pulsing with need, but he was never provided with any direct contact between his legs. A cooling feeling made him grunt, and as the monster pulled away he felt his navel had somehow returned... perhaps another trick of evolution. What was once a normal looking belly button had become a distended bump, and the strain had turned it a deep maroon. 

Pascal wiggled again, causing his belly to wobble and sway, but it was no use. Perhaps this wasn't the end for him, but it also seemed he wouldn't be leaving anytime soon. Would the gestation cause his tummy to grow even further? Or would he simply incubate? Either way... he was still throbbing helplessly. Truly the greatest horror of all, a permanent erection with no hope of release.