Write an intensely explicit pornographic "female muscle fetish" femdom story about NAME_1 a skinny man who is lying in bed when NAME_2 his 6 foot tall female bodybuilder wife gets horny and climbs into bed with him. She flips him onto his stomach and climbs on top of him, then humps him until she climaxes, then rolls over and falls instantly asleep. Focus on how used he feels as NAME_2 treats him like an object for her sexual relief, with no concern for his own please, and how emasculated he feels as she rubs her huge, hard clit against his buttocks, grunting all the time, until her climax soaks him with her juices. Write vivid detailed description of NAME_2's gigantic muscles and breasts and focus on how small and vulnerable NAME_1 feels.