Stardew Valley's creator is currently working on a Version 1.4 update for the game, and it sounds like it's going to expand the experience in quite a few ways. Check out what developer ConcernedApe had to say in an interview with USGamer below.
The new 1.4 update does add some depth to post-marriage life... some additions that I'm proud of and I hope are very heartwarming for players... but I know there will always be more that can be done.
I've been unofficially calling 1.4 the "everything" update because it touches pretty much every aspect of the game in some way or another. One of my major goals was to add in a lot of "quality of life" features that make the game more convenient and effortless to play. There are some really simple things that were missing from the game that really improve the experience, like being able to press TAB on PC to switch from one row of your inventory to the next, or to be able to hover over an item and get an indication as to whether it's required for any of the community center bundles or not.
There are lots of things like that in this update... once players experience them, I think they'll wonder how they ever managed to play the game before! From a big picture, I see 1.4 as bringing a whole new level of polish to Stardew Valley, as well as adding in lots of rich and rewarding content to the game.