Calling about your family members is a bug.
As to whether you can disable them or not, that depends on whether you’re willing and able to use mods. Bienchen has a mod disabling or just fixing them (no calling toddlers to ask if you should date your first cousin, no calling your boyfriend to say you found a ring in his bag), depending on the version you choose.
I just went on a date with another Sim and they committed to be in a relationship and as soon as my Sim got home the call came if he should ask someone else out.... This happened to me before and it bothers me so much! Please fix this bug!
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