プロンプト

A man into the frame from the left side. The woman lying on her side, hips slightly elevated, her face showing a mix of apprehension and arousal as she feels the man's thick penis pressing against her tight anus. Her fingers dig into the sheets as he slowly pushes inside, her mouth falling open with a sharp inhale. His hands grip her waist firmly, his own expression tense with concentration as he works his cock deeper with shallow, controlled thrusts. Her thighs tremble slightly, her back arching as she adjusts to the unfamiliar fullness. His balls press against her skin with each careful movement, their bodies moving in a slow, deliberate rhythm as she gradually relaxes around him.