As of right now I've been on a huge inflation kick, so I'm thinking a lot about someone ending up inflated and their partner having to take care of them... Being stuck like that, either permanently or just for a long stretch of time, and having to find ways to make life work when someone's just a big round ball.

Also love the idea of a skinny character getting to fatten up post-story, being spoiled and taken care of when they're not used to that at all.