His eyes did narrow at what she said. "You shouldn't remember me doing this before. Stupefy." The spell caused the woman to fall back on to the silk sheets of the bed she sat on. With how she collapsed, her chest open to reveal the rising and falling of her bare breasts along with one leg draping off the bed, it almost looked like she was dead. "Memoriae." Slowly, the woman's memories floated into the air above her temple, allowing him to rewrite their current encounter with his wand. Draco never obliviated her. He only changed the details of what she remembered as it would raise suspicions to her bosses and coworkers if she had gaps in his memory - Not to mention overuse of the spell would damage her mind and then he would really be in trouble.