It was a book my sister and I owned when we were children and we were born in 1990 and 1992. The copy we owned had the cover ripped off so we can’t remember anything based on that. From our memory it was a children’s picture book – the images we specifically remember are a tire swing and a blue minivan. We can’t remember if the character had a cousin or a friend that came to visit or if she went to visit them. But what we remember is that during this visit (most likely with a cousin but possibly a friend) she had all these plans for what they would do together and then nothing turns out as expected and she’s disappointed. I think there is something about her being annoyed about her little sister and wanting to exclude her and then in the end she realizes her little sister is actually great. My sister thought that maybe something was culturally different between the two girls, but it could be getting mixed up with another book. When we googled, it seemed similar to the book “When the Cousins Came” but it’s not that book and that one was published too recently as well. It definitely takes place in the summer or in warmer weather. My Mom remembered that the girl might have had red hair, but my Mom’s memory isn’t always the greatest so I wouldn’t say that is definitely a part of the book, but figured I’d add it just in case. I know this is pretty obscure but hopefully you can help!