Benophie and birth control
We always wonder if Benophie will be pregnant or already with a child at the beginning of S5, but what if their subplot is actually them trying to get pregnant? Not with an infertility storyline, but them starting to try for a baby after 2 years of birth control.
All the couples so far got pregnant rather quickly, but what if Benedict and Sophie defied expectations (which would be on brand for them) and actually decided to have a couple of years just for themselves before having a baby?
Benedict is the second son, so there's no pressing need for an heir. Also, S4 made a point to show us that: 1) Benedict knows how to avoid pregnancy; 2) Sophie is aware of her cycle and knows how to track it; 3) Benedict and Sophie know how to have a good time without going all the way.
So I think them still being childfree at the beginning of S5 and only getting pregnant by the end of it is a real possibility. Also, there hasn't been a pregnancy reveal moment between a Bridgerton couple yet, and I'd love to get one with Benophie. Lukerin's acting would probably turn this scene into a masterpiece. ❤️