You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a vast collection of Once Upon a Time fanfictions. Just type in 'Captain Hook and Emma' in the search bar, and you'll get numerous results. You can also check out FanFiction.net, which has been around for a long time and has a lot of fan - created content related to this pairing.
One popular trope is 'Enemies to Lovers'. Captain Hook and Emma start off at odds with each other in the show, and fanfiction often plays on that dynamic, gradually turning their relationship into a romantic one. Another is 'Time Travel'. Writers might send Emma or Hook back in time, which changes the course of their relationship and creates new and interesting scenarios.
One great Hook Emma fanfiction is 'A Pirate's Heart'. It beautifully captures the chemistry between them. The story takes them on an adventure where they have to face many challenges together, which deepens their relationship.
In the fanfiction, perhaps Emma's pregnancy is a magical one. Maybe it was the result of some long - lost magic that got reawakened. Hook would be both excited and a bit scared. They could go on a journey to find a way to ensure the baby's safety in a world full of magic and curses. And Emma might struggle with her usual role as a savior while being pregnant, but Hook would be there to support her every step of the way.
Well, perhaps the fanfiction could focus on Hook's backstory related to the birth. Maybe he had some past experiences that make him extra cautious during Emma's pregnancy. For example, he might have witnessed a difficult birth in his pirate days that scarred him. So when it's Emma's turn, he's constantly on edge. The plot could then revolve around him coming to terms with his fears and being there for Emma as she gives birth.
A baby fanfiction about Emma and Hook could involve their journey into parenthood. Maybe it would start with the discovery of Emma's pregnancy. They'd have to deal with the joys and fears that come with it. Hook might be overprotective, given his past losses. And they'd face challenges from the magical world they live in, like protecting the baby from dark magic threats.
The 'hurt/comfort' trope is quite prevalent too. For example, when Hook gets injured and Emma takes care of him, or vice versa. It shows their deepening connection. Also, the 'time - travel' trope can be found, where they might go back in time and experience events that change their relationship in the present. This adds an interesting layer of complexity to their story.
They first met when Emma came to Storybrooke. Hook was already there, and he was intrigued by this new arrival who seemed to have a lot of power. He was also a bit of a troublemaker at first, but Emma didn't let him push her around.
Their adventure on Neverland was quite something. Hook had his history there and Emma was new to the place. They had to work together to outwit Pan. Emma had to rely on her wits and magic, and Hook on his pirate skills. There were moments of doubt and moments of great courage, and in the end, they became closer because of it.
They met in the Enchanted Forest. Hook was initially a bit of a rogue, and Emma was on her journey to find her place. Their paths crossed during some sort of adventure or quest, and from that first encounter, there was a spark of something special.