Here's a completely non-hypothetical question, but can we just pretend it's hypothetical for a few minutes?
Two people are really good friends. They live in the same house, but have separate bedrooms.
They spend time together - no one is really sure when they "fell in love" with each other, because they have loved each other deeply for a long time.
Both people needed time to sort out themselves, and living in the same house, but not being "together" was very conducive to the individual work they each had to do. In the process of the individual work, it became a work on their relationship... a rather organic and incredibly perfect process if you ask me.
Then they went camping together and on a cruise together and other vacations where they shared the same space. And it just seemed natural to sleep together.
So, when they got home and kept sleeping in the same space, does that mean they "moved in together"? And if you start sharing a room with someone, do you need to announce to the world that you are sleeping in the same bed? Is that anyone's business?
Well... anyway... if there needs to be an announcement made, consider this my announcement.
And if there doesn't need to be an announcement made, then this is just about the silliest post I have ever written.