Younger child embarrassing older child

[JuneCurlew]

I'm looking for some advice or thoughts from anyone who's experienced similar: My daughter (D1) is at secondary school, going into Yr9, and her younger sister (D2) is starting Yr7 this year. D2 is a bright happy child but slightly young for her age, and there is already some friction - there were some induction days last week and D2 wanted to sit near D1 on the bus, talks loudly, tried to be affectionate etc. D1 was, by all accounts, very tolerant, but told me she found it difficult and a bit embarrassing. We live in a rural area with only one bus to and from school so there is no getting away from each other. D2 has no friends who will catch that particular bus, and struggles slightly already with the whole friends thing. I know there are two months to go until September and I will have a quiet word with D2 - but I'm also struggling, I want D2 to be who she is, enthusiastic and friendly, I don't want to have to tell her to tone it down/be quiet/leave her sister alone.
thanks for any comments.

She can be who she is without allowing that to stop her sister being comfortable though.

When it comes to seeing her sister in school she needs to tone things down so saying hello as they pass is one thing but being affectionate on the bus (?) is another and telling her that is fine.

By 'being affectionate' I mean trying to hug her from the seat behind, just being a bit full on.

I'm probably overthinking this and worrying about nothing!!

Your daughter is old enough to understand that hugging etc is not OK for her older sister. Telling her not to do this is not stopping her from being who she is. You need to just tell her.

Maybe just tell her she needs to sit properly on the bus, because hugging from behind is dangerous in an accident? (This is true, by the way- in a crash momentum would likely throw them both forward and she could seriously injure her older sister- even a jerky stop could cause them to crash heads in this position).

I imagine in and around school, the novelty of seeing her sister will wear off a bit, especially as she'll make her own friends.

It is okay for her older sister to set boundaries- e.g. no hugging in school. Your DD2 needs to respect everyone's boundaries (older sister/new friends) otherwise she'll likely have a difficult time of it.

Surely they’ll work out their school time interactions themselves? I was a younger sister and my big sister would have been annoyed with me at home if I annoyed her at school - not worth it as I liked her being happy with me lol. Sometimes leaving them to work stuff out for themselves is healthiest, obviously keep an eye on things but it should work out.