In the dimly lit room, a woman lies on her back, legs spread wide, as her partner kneels between them. Her anus is lubed and ready, puckering in anticipation. He presses the head of his cock against the tight hole, pushing slowly until she gasps, her body tensing. He stops, allowing her to adjust, before sliding in further, inch by inch, until he's fully sheathed. She reaches down, rubbing her clit as he begins to thrust, her moans growing louder with each stroke. The room fills with the sound of their bodies slapping together, their grunts and groans, and the wet, squelching noise of his cock sliding in and out of her ass.