Comment by dkasper

You'd think Facebook's algorithms would prioritize your spouse, but you could use friend lists to make it do what you seem to want. You can add people to your "close friends" list and you'll get notified whenever they post. Also tends to put their posts in your feed more from what I can tell (based on the minimal amount that I use FB these days).

https://www.facebook.com/help/598069963644156