This is the second one, read the [first chapter](https://www.reddit.com/r/eroticliterature/comments/jlijmh/submit_the_demons_mffff_chapter_1/) to understand the context.
When I made that discovery I came again and the place in my balls was emptied but started to fill itself again. That way I could fuck until my body is exhausted, but cock will allways cum. The space enlarged itself from time to time and could hold more cum.
The demoness made me cum at least five times and the cumloads were bigger each load. Her face started to be filled with pleasure and it wasn’t deadpan anymore. She let out some moans and her eyes roled up. “I didn’t think you would have such an endurace. I really underestimated you. You would make a good sex servant. I won’t kill you today by draining you empty.” She did it again. She was talking nonesense again. I will maybe make her my sexslave. But I’m not going to be anybody’s sexslave. But at the moment I could really do nothing. She said to the four demons, “Each one of you can get one load to. You better do your best.” The one on my right leg was going first.