I'm disappointed. I genuinely expected that she was testing him, due to some trauma she had in the past with men, and now wanted to see if she can trust the step-brother. Alas, she's just so desperate for money she's ready to (literally) suck her step-brother dry, because obviously that would avoid getting into trouble out there with strangers. I'd be more willing to accept her desperation if she actually was in a desperate situation. But from what I can see, she just considers her mother, a financially and otherwise independent woman, her idol and she wants to be the same already in high school. Yet she hasn't got a clue about anything. Anything at all. She's all phoney.