The reason why she didn't immediately "take the money and run" was because, on one hand, Tommy needed money for his surgery, as well as for his continued rehabilitation treatment. During this time she took care of Tommy, she might not be able to work and would have to accompany him at the hospital. This meant that for those few months, she might not have any income. Therefore, she still had to obtain the remaining 700,000 that Robert Thomson mentioned.
But as for those other things like houses, cars, and jewelry, did she need them?
If she didn't need any extra "bonuses" and "commissions," then why bother trying so hard to serve him?
When he was dressed for work, he looked professional, but without clothes, he was utterly beastly.
She accompanied him at work, in bed, and while dealing with clients—an absolute "triple-accompaniment." With such dedication, a million per month actually seemed like a loss for her, right?