One possibility could be that they face challenges in protecting their unborn child from the threats in their dragon - filled world. For example, they might need to find a safer place to raise the baby, away from the more dangerous dragons or villains. Maybe they also struggle with how to balance their duties as dragon riders with the upcoming responsibilities of parenthood.
When it comes to 'How to Train Your Dragon' fanfiction with Astrid lemon, it could mean anything from intense emotional conflicts to bold actions. It all depends on the author's imagination and creativity.
It's all about imagining their adventures in a contemporary setting. You can have them dealing with modern problems while still retaining their dragon-training skills.
To write an Astrid fanfic, focus on her relationships with other characters and build on the existing world. You could have her go on a quest to find a lost artifact related to dragons or have her train a special dragon with unique abilities.
Often, the betrayal could stem from a secret Astrid keeps that accidentally harms Hiccup's interests or trust. Maybe she makes a decision without consulting him that has negative consequences for him.
The likelihood of Astrid being pregnant in How to Train Your Dragon 2 fanfiction is completely up to the creativity of the fanfiction writers. Some might choose to incorporate this element for added drama or character development, while others might not find it relevant to their particular storylines.