"And you're bigger so it evens out." Bigger people need more food because they go through more in a day, Simon explained to her at one point when she asked him in fascination at how much he could eat. "...I should be able to get you food. But I can't get money." Not without reverting to pickpocketing, which sounds too risky to her as long as there's another way, or searching bodies, which... no. She's still shaken by the sheer amount of vampires running around this place, and would rather stay far away from them.