помогите мне нужно написать письмо с советом что сделать девочке чтоб старшая сестра ей не мешала
в зеленой рамочке

Hey Matt!
I know about your problem and I can give you one advice! You can tell her, that it is uncomfortable for you! Or you can tell about this problem your parents, I think they can speak to her and she will understand it! 
Wish you luck,
Adely (your name)