Start off simple

Feeling emboldened by their new arrangement, David decided it was time to test the boundaries of Rachel's submission. He pulled out his hard 6-inch cock and asked politely: "Would you mind sucking me off?" The request was almost comical in its politeness given the circumstances.

Rachel burst out laughing at David's formal wording but didn't hesitate to comply. She dropped to her knees, taking his shaft in hand as she began to suck him off with gusto. Her lips wrapped around the tip of his cock, and she started bobbing up and down, teasing him expertly with her tongue.

David was consumed by the pleasure coursing through his body. Rachel's mouth felt like heaven, and he couldn't help but moan in ecstasy: "You're really good at this." The words left his lips before he could stop himself, and as soon as they did, he realized what he'd done, unintentionally triggered the curse.

Rachel's eyes seemed to glaze over momentarily as the curse took effect. When her gaze refocused on David, there was an almost feral intensity in her expression. She redoubled her efforts, sucking him off with a skill that was almost supernatural.

David felt like his soul was being sucked out through his cock as Rachel's mouth worked its magic. He could only moan and writhe beneath her ministrations, completely at the mercy of her newfound expertise. The pleasure was so intense it bordered on pain, leaving David gasping for breath.

As she continued to suck him off with unyielding enthusiasm, David realized he was reaching his limit fast. Rachel seemed determined to bring him to completion, and he lacked the willpower to resist her talented mouth any longer.

With a final burst of suction that made his eyes roll back in his head, Rachel pushed David over the edge. He came hard, spilling his load into her mouth as she eagerly swallowed every last drop. The sensation was overwhelming, leaving him panting and spent.

As Rachel released his cock from her lips, David collapsed backward onto the bed, utterly drained but deeply satisfied. He watched through half-lidded eyes as she stood up, a smug smile playing on her lips. "How was that?" she asked, clearly pleased with herself.

David could only manage a weak nod of approval, still trying to catch his breath. The power of the curse had turned Rachel into a cock-sucking goddess, and he wasn't sure if he should be amazed or intimidated by her newfound abilities. One thing was for certain, he wouldn't forget this experience anytime soon...