Woman spanking art
Woman spanking art is a sub-genre of spanking art that features women as spankees. It includes F/F and M/F, among other variants. Typical scenes are husband/wife, boyfriend/girlfriend, and teacher/adult schoolgirl.
A lot - in fact, perhaps most - of woman spanking art is erotic in nature; some of it is pornographic. Woman spanking art is the most popular sub-genre in commercial publications (spanking stories, spanking photos and spanking drawings/illustrations), e.g. on pay sites and in spanking magazines.