20 hours in

At twenty hours in, the challenger was still erect, despite splitting a score of big-ass cumms with the champ.
She suggested a shower, trying to regroup. As soon as they were back in the bedroom, his libido was again eating hers alive. In no time the champ was cumming, but cumming her last!

After no more than a two minute peak, she began to descend, no longer a titan of sexuality, but a worn and subdued sexfighter, knowing her place below him.
Within minutes, exhaustion claims the former champ in a complete K.O.
(Dedicated to Hungrybearr)