Erwin, who was caressing her thighs, looked up at Adelaide and hesitated for a moment before admitting, "My previous mistress taught me how to please women. She used me to fulfill her desires and taught me everything I know." this hurt her ego a little which is why Erwin had said that.
Erwin noticed the slight change in Adelaide's expression and he couldn't help but smirk, feeling a sense of satisfaction. It was clear that he had gotten under her skin.
Adelaide raised an eyebrow, a mixture of surprise and amusement on her face. "Oh, so you're not just a cute little pet with a natural talent," she teased, a mischievous glint in her eye. "You've had some professional training, I see."
Erwin couldn't help but chuckle at her teasing. "Well, I suppose you could say that," he replied, his hand still gently caressing her thigh. "But don't worry, professor. You're the only one I want to please now."