Prostitute endures anal sex for cash despite sore ass

A woman in black lace lingerie and stockings is shown engaging in anal intercourse with a man on a gray shag rug. The man penetrates her from behind while she is on all fours, then later lies on her back as he continues. Her facial expressions vary between neutral and strained during the act, consistent with the title's claim of discomfort. The setting is a simple room with a closet and plant visible in the background.