"Master, I don't think my stamina can keep up with you." Rania said honestly. Even an hour would be a stretch, especially if the Demon Lord did not stop thrusting his massive dick inside her.
"I make my own preparation." Lo and behold, crates of potions, stamina potions now she looked at it clearly. Something she could barely afford as an adventurer but not would be used wantonly, for sexual purpose.
Her former adventurer self would look aghast at the sheer waste. The current her expected such thing to be used and more than happy if it allow her to have more time with the Master.
"Let start then." The hand on her crotch was lifted, along with the fingers that had been in her. The void inside of her begging to be filled, but Rania stopped herself, waiting for the Demon Lord to begin.