Maybe they get caught when Jacob is sneaking into the Cullens' place to see Renesmee. As a result, there could be a big fight between the werewolves and the vampires. The two groups, which have a tenuous peace, might break out into conflict again. Renesmee would be caught in the middle, feeling guilty for causing such trouble between the two factions.
In some fanfictions, they might get caught because someone spies on them. Once caught, Renesmee could face a lot of restrictions on her freedom. Jacob might have to face the wrath of the Cullens. However, this could also be an opportunity for them to finally be open about their relationship. They could start a dialogue with the people around them to try and gain acceptance, but it would be a difficult and long process.
In fanfiction, if they're caught, it could be the start of a whole new adventure. Their relationship has always been a bit of a taboo in the Twilight universe. So being caught might force them to re - evaluate their relationship. They might have to find a way to convince others that their love is real and worth fighting for. This could involve them going on a journey to prove themselves, facing various challenges along the way, and ultimately changing the way the vampire and werewolf communities view their relationship.
Jacob's wolf pack would also have a range of responses. Some of the younger wolves might be excited for Jacob, seeing it as a new chapter for their pack. But the older, more traditional wolves might be worried about the implications of this union for the pack's future and their relationship with the vampires. Jacob would have to work hard to convince them that this is a positive step.
If Jacob and Renesmee get hurt in fanfiction, it can stir up a lot of emotions. Jacob's werewolf friends could be enraged and start a hunt for the culprit. Renesmee, being so young and precious to the Cullens, her injury might make the family reevaluate their security measures. It could also lead to some internal conflict within the family. Some might want to take more drastic actions to protect her while others might be more cautious. And Jacob's relationship with the Cullens could be put to the test. His injury might make the Cullens question if they can really trust him to protect Renesmee.
Jacob's character might develop by becoming more accepting of the vampire world because of his love for Renesmee. He could start to see things from their perspective more often. Renesmee, on the other hand, could develop by becoming more independent. With Jacob by her side, she may feel more confident to explore the world outside of her family's protection.
Writers often develop their relationship through shared experiences. For example, going on adventures in the forest together. These experiences bring them closer and help them understand each other better. Also, through communication. Jacob might share his thoughts about being a wolf, and Renesmee could talk about her unique existence as a half - vampire - half - human.
When Jacob and Renesmee are hurt in fanfiction, different characters have different reactions. Carlisle, as the family doctor, would be focused on treating their wounds. Esme would be like a mother hen, fussing over them and trying to make them comfortable. Jacob's wolf pack would be ready to fight. They see Jacob as one of their own and Renesmee as someone they are bound to protect because of Jacob's connection to her. It could lead to a big showdown between the pack and whoever or whatever caused the harm.
One possible reason could be that Renesmee simply has different interests. Maybe she is more drawn to a different lifestyle or set of values that Jacob doesn't align with. For example, she might be interested in exploring the world in a more solitary way while Jacob is more about the pack and community.
Another theme is growth. As they are both young in the story, fanfictions often show how they grow both individually and as a couple. For example, they might learn how to deal with their unique powers and how that affects their relationship.
Many fanfictions look at their relationship from the perspective of loyalty. Jacob is loyal to the Cullens because of Renesmee. These stories often detail how their relationship grows as Jacob stands by her side through various difficulties. They might include scenarios where Renesmee is in danger and Jacob's unwavering commitment to her is highlighted.
Fans often portray their relationship as very loving but also full of challenges. They might show Jacob as being extremely protective of Renesmee during the pregnancy.