Femdom or female domination sex stories, are those where a woman takes the lead.
Dominant wives, girlfriends or women in positions of power, are usually the main character, with a submissive male or female, attending to their every demand.
For male and female subs, femdom fiction is likely to contain story elements of both softer activities like foot worship and teasing, to more hardcore activities like light torture, pain play (nipple and genital clamps, CBT), strap-on sex (pegging), figging, smothering / suffocation, orgasm denial, fisting, anal play, spanking, toilet play and humiliation.