<human>: Apologies in advance if this is the wrong subreddit. 

So I babysit for this family with three beautiful girls, ages 12, 9, and 4. They're fantastic kids. They do what they're asked, they get along most of the time, they're active and kind. The parents are fantastic too. I babysit roughly twice a month for them.

Lately though, I've noticed something that worries me with the 12 year old, and I'm not sure what to make of it, or if I should bring them up with the parents.

The 12 year old doesn't really eat without permission. I'll clarify this. If we're having pizza for dinner she'll take off the cheese and take a few bites and then say she's full. However, a couple weeks ago we were having pizza and she did this, I was in a show with her and her 9 year old sister, and I went on and laughed about how I'm always so hungry during tech week, I could eat a whole pizza by myself, etc. Now, she'd already done her "I'm full" thing, but after I said those things, she went back and ate three full slices of pizza. Last week, when I didn't say anything she did her two bites thing again. I had a similar experience when I take the girls for frozen yogurt. She'll fill up her cup but only take a few bites unless I literally talk about eating all of MY yogurt while doing so. I've sort of dubbed this "permission eating" and I'm unsure what to make of it.

She's a great kid, and she's great with her little sisters. It's this eating thing that I'm concerned about. But then I don't know if I should be because I know the feeling of not wanting to eat in front of people I don't know well. It's just been going on for a while, coupled with the fact that she had to leave rehearsal a couple times because she was having random chest pains.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: 12 year old I babysit doesn't really seem to eat much unless I'm talking about eating a lot of food while we're eating. Is this "permission eating" something I should bring up to the parents?