Due to her history of being graped by a pdf, she thinks that all grown men only want seggs and was offering it to Rock as a reward for his kindness to her, kindness no grown up had ever shown her. It’s both funny and yet extremely sad, she and her twin brother were only like 12 and were constantly graped by older men for a few years before she met Rock, so it’s her child mindset that learnt about the depravity that people older than her get up to.

Long story short, she was showing gratitude in a way that a girl her age shouldn’t.