Madame Svea knew that this guy was gullible and she had to take advantage of him for her own selfish needs. That is why she chose to dominate the guy and do it in a way he had never experienced before. She acted as if she was teasing him and without him noticing, she milked him dry using sweet nothings. He went home with empty pockets and yet he had gotten virtually nothing from her.
Madame Svea wanted a raise at work but she did not get it. She was so pissed about it that she came up with an alternative way of getting it. She turned her boss into her financial slave. She made him her human atm and it was through her hypnosis as well as her naughtiness that she did it. And she happily got the money she wanted and she did not do much to him in return.
Madame Svea did not want to fund her education with debt. She did not want to finish college and saddle herself with a lot of debt that would take years to repay. So she thought outside the box and she felt that using her gift of teasing and naughtiness would work better as she could get some guys and turn them into her paypigs and make money from them which she would use for tuition among other things. It worked.
Madame Svea choked this guy so as to send a message to him. She did it tactically because she knew that the guy would not readily agree to what she wanted unless he saw that there was a price to be paid for it. So she choked him and told him that if he did not do things her way, he would have to contend with her in a pissed state.