Don't worry, Facebook already has Fading Connections
You can be married to each other and your posts won't show up on the other person's feed (there's a post on HN about this)
I don’t post on Facebook—HN is my closest analogue. But I assure you my partner(s) have no interest in seeing whatever I post here. Any more than I want to be in the thick of the extended-family group chats. Or, frankly, Facebook.
In that sense, maybe this is Facebook doing its part for domestic harmony…
Yup, it's annoying as all hell.
Xitter was kind of doing the same thing: I can’t see anything my mom posts, but I definitely have to see everything Elon’s mom does.