I was able to crawl out of my art slump with self-indulging Yoruno/Kaida art when Kaida was pregnant with their first son.
It was slightly stressful for both as they were on the run from Yoruno's psycho mom.
1) is a few weeks after knowing the news. Kaida got sick a lot so they stayed at random places so she could get better
2) is during their travels before entering the village where they meet Kaida's older brothers
3) after they settle in w Kaida's actual clan; the Tamashi Clan. Yoruno missed his pregnant wife while he was hunting for food