To write moaning sounds that convey a mix of intense pleasure and pain, consider the following approach:

1. Use Descriptive Language: Focus on vivid adjectives and verbs that capture the physical sensations. For example, "Her moans were a desperate blend of pleasure and agony, each cry escaping her lips like a symphony of ecstasy and torment."

2. Incorporate Rhythm and Pacing: Vary the length and intensity of the moans to reflect the character's experience. Short, sharp gasps can indicate sudden bursts of pleasure, while longer, drawn-out sounds can express overwhelming sensations. For instance, "A high-pitched wail escaped her throat, followed by deep, guttural moans that echoed her conflicting emotions."

3. Emphasize Emotional Conflict: Highlight the character's internal struggle between pleasure and pain. Use phrases like, "She whimpered, caught in a whirlwind of sensations, each thrust sending waves of both bliss and discomfort coursing through her body."

4. Create a Soundscape: Paint a picture of the environment and how it amplifies the sounds. For example, "The room was filled with the sound of her moans, each one bouncing off the walls, a haunting melody of desire and distress."

5. Utilize Repetition for Impact: Repeating certain phrases can enhance the intensity. For example, "With every deep thrust, her moans grew louder, 'Oh God, yes... no... please... more!' a chaotic chorus of pleasure and pain."

By combining these elements, you can effectively convey the complex emotions and sensations associated with the described scenario.