My mom gives me an allowance. She keeps me pretty tight-reined.

In this remark, Moretz presents a deliberately ordinary picture of a child actor’s life: despite fame and earnings, her spending is controlled by a parent through an allowance. The phrase “tight-reined” (from horsemanship) suggests firm guidance and limits, implying that financial discipline is part of her upbringing and protection. Read in the broader context of celebrity culture, the quote functions as a quiet rebuttal to assumptions that young stars have unrestricted access to money or adult freedoms. It also underscores parental oversight as a stabilizing force amid early professional success.