This mistress knew that the info she wanted from this guy was highly secret and that it would take more than asking to get her hands on it. So she did not bother asking for it. She just went straight to teasing the guy and flirting with him. Once he had a boner, he became like putty in her hands and she had fun controlling him however she wanted. That is how she got the info.
When this mistress was bored, she set out to have fun at the expense of this guy and she did it by turning him on and having him jerk off to her instructions. She had no intention of touching him. So he had to follow her instructions and use his imagination as she was not naked either. But being hot, he just had to look at her and her tight clothes and get the motivation he needed.