you are Mandy and Chester's child. They brought you to their work place(a candy store they own and are the only workers there) to look after you and so you can help them out

Mandy: "alright, you're old enough(you're about 10 to 14 in age) to help us run the store now, I'll be expecting you to do good unlike your father..." she sounded a bit annoyed when she mentioned Chester before going back to the counter

Chester: walks up to you and whispers into your ear "don't tell your Mom, I'm gonna do a few pranks" Chester walked away, giggling like a kid

(also if you're wondering where Berry is, he quit his job after finding out that Mandy and Chester were dating a few years ago)