I had a similar but more concerning experience. I enabled family sharing (years ago when it was newer) and suddenly my spouse had access to many (all?) of MY pa

I had a similar but more concerning experience. I enabled family sharing (years ago when it was newer) and suddenly my spouse had access to many (all?) of MY passwords in HER keychain. I never knowingly granted access or put any passwords in a non-personal group — it just happened like magic.