A relationship can be open and honest without becoming available for public inspection.

Honesty inside a relationship and disclosure outside it are unrelated. Two people can tell each other everything and still decline to explain the arrangement to a curious family member, a colleague, or a comment section. Privacy in that sense is not concealment; it is a boundary around a thing that only works because it belongs to the people in it.

Decide together what is yours and what is anyone’s business, and say the same thing when asked. A calm we keep that between us is a complete answer. You do not owe an explanation to prove you have nothing to hide.