Being incidents in the life of Astro City -- what superhero universes would really be like -- emotional, not practically. Short tales. I don't think any are more than two issues.
Despite the title, not all of them revolve about families, though some do. A man newly arrived, with daughters, gets to see how much superhero action the city sees. A little girl superhero goes on an adventure to be less superhero and more little girl. An elderly supervillain aims for some credit. A superhero whose wife is pregnant wrestles with the conflict between the need for heroes and the baby's need for a father. And a cartoon brought to life recounts his sad life.
High drama and emotional matters.