A sibling has seen every version of you, from diapers to diplomas. Treat that witness well.

Long witnesses are rare. Someone who was present for the whole sequence knows versions of you that no photograph caught and no friend ever met, which is an odd intimacy that outlasts most others. It also means old roles are hard to shed, because they remember you inside every one of them.

Try letting a sibling meet who you are now instead of who you were at eleven. Ask them something you would ask a friend. If the relationship is difficult, keep the contact honest and small rather than forcing a closeness that is not there.