I love adult yuri, married with a small child is the best. The adult life tag needs more attention
For real. It's a complaint I have about anime and manga in general that it's so rare to see adult leads. This manga was particularly cute.
Its down to the old rule of storytelling. Ask is this the most interesting part of a characters life if not then why are you writing about it. In Japan and most other places around the world once you get out of school your life becomes very very boring. As such you need to do something to make it interesting or at the very least entertaining.
Just working off raw cute will only get you so far and being funny gets more and more difficult the longer the series goes on. A good example of how to do domestic stuff right is dragon maid where its funny weird and interesting. Its a shame because adult stories done well can be amazing.