A 14 year old I don't like (not mine)

[Ithinkimalittlehorrible]

Sorry if this is the wrong place to post this.
recently I started working on a community project and there are a few older kids getting involved. Most are fab - really funny, quirky people.

However, I'm scheduled to mentor one 14 year old girl for a theatre show, but I'm finding it really difficult!
I have a teenager myself (also a girl, 13). This girl is quite confident to the point of being bossy. I think, as a girl or woman, being assertive is a brilliant trait and one that helps you massively in life, but her quite forward/think she knows best attitude is really grating on me. An example of this is where she tries to take over with directing the production (by shouting out to the actors).
Her mum is often present, which makes me feel more self conscious. She is also bossy and thinks she knows best, but presents as a bubbly, kind, happy person.

This makes me feel like such a mean person, but I really dread seeing her where she is so grumpy and entitled, though she's not always grumpy in truth, just a little annoying.
So, go on - how horrible am I?

Not horrible at all.
Being precocious or inappropriately confident is not an endearing trait.
You can be confident but you also need to be respectful of others and understand dynamics/ your place in a team etc
I’d struggle with this.

Thank you Victoria, that makes a lot of sense to me.
I don't feel that she understands her place in this, but also - I struggle because I don't want to knock her down (as that does feel mean!), but equally, I feel this project might drive me mad if I don't do something.
I guess it's about putting in very clear boundaries and being a little strict with them..?

Yes that’s the right way to go. Teachers often have to deal with children and teens that have been in a home environment where everything they do and say is fascinating and some thing to be celebrated but it’s just not a nice way to be and isn’t a good thing to carry into adulthood.
it’s probably easier to tackle it with the child than with the mum who is likely to be angry that not everyone thinks the sun shines out of her daughters arse.

I would do a little group session about being respectful of everyone’s ideas and contributions and sort of lay out the hierarchy, so it’s indirectly aimed at her.
Then if it still happens talk just to her and remind her of your conversation and group rules.

Great ideas - thank you.
There's a good opportunity to talk to the group as a whole for a few minutes before we get started next time. Feeling more positive about this - thanks!