The tip of the tongue probes deep into the anus. Trembling with shame yet instinctively tightening her lower body, she feels a rough, cold sensation tearing through her mucous membrane as it slips slimily deeper inside. A sharp, jarring sensation runs from her anus up her spine, making her entire body shudder. Sounds escape her lips. "Haa... kuu." Moans leak out in rhythm with the tongue's movement. As the oral stimulation continues, thick, sticky fluid begins oozing from her private area. Her hips start swaying in sync with the tongue's rhythm, gradually speeding up as pleasure takes hold. "Nn... no... I'm going to come... in my ass, igu..." Shaking with pleasure, a complex mix of embarrassment and arousal swirls within her.