Powergirl invites Superman over to show him her superb conditioning. Superman makes fun of Powergirl's chest say its weak so Powergirl rips off her top. They start wrestling and muscling each other and end up nude with Powergirl riding Superman's cock until she has an orgasm and sucks up his strength. They wrestle naked again until Powergirl totally defeats Superman and leaves him in a useless heap on the floor.