At my school, two OOS siblings who went to my high school have reunited this school year. Guy’s a junior, girl is a freshman, so I’m sandwiched in between them as a sophomore. The girl always wanted to attend the same college as her older brother because she fell in love with the school when she toured it. She’s joined a sorority now, so I assume that they only see each other when they want to. High school had about 1900 students, the college we attend has 15,000. They definitely have to make an effort to hang out.
My own younger sister (HS junior) has no plans on even applying to my school, which I have absolutely no objection to tbh. She’ll get into better schools than I ever did, without a doubt. She plans on remaining in the Northeast. My younger brother (HS freshman) remains to be seen. I think he’d be open to other regions, but I have a feeling he’d stay up north as well.