What's next?

The creature grabbed his cock and looked closely at the tip. It stuck out its tongue and tickled his urethra with it, trying to get more cum from him. Luke assumed it would just start milking him again, and whatever it had done to his penis to get him hard once more made Luke almost look forward to it until something strange happened.

The creature grabbed his foreskin, opening it up, larger than expected almost like it was bending reality, but before Luke could do or say anything, the creature quickly enter his urethra and disappeared, entering his penis completely and leaving him sitting there on the floor, staring at his cock as his heart raced in his chest, suddenly very concerned as to what just happen.

"What........ WHAT THE FUCK!?" Luke yelled as he grabbed his penis, not sure what to do as he saw strange things starting to happen. "Oh God....... get out of me!" He begged as his balls began to turn blue, and the veins on the side of his shaft started to turn blue as well. "Shit...... SHIT!"

His penis began to grow larger, pulsing a stretch as the tip turned purple and the skin on his shaft turned blue. He could feel the thing moving around inside his penis and was starting to panic because he didn't know what it could do to him as his cock grew longer in his hands while he desperately held it, trying to keep it from growing but failing.

"Shit..... STOP..... WHAT ARE YOU DOING?"

Finally, his penis stopped growing, standing there at two feet long and at least 6 inches thick as it pulsed, making a sickening squishing sound as it did. Every pulse sent a strange sensation through it as well that didn't feel unpleasant but he was still too frightened to enjoy.