It's not appropriate. Fanfiction should focus on positive aspects such as character development, new adventures, or exploring different relationships in a non - sexual way. Sexual fanfiction can make many fans uncomfortable and can also give a negative image to the fan community.
You can try searching on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just type in 'Sam and Jack pregnant' in their search bars, and it should bring up relevant stories.
There's this fanfiction called 'Sam and Jack: Unlikely Allies'. It starts with them being at odds with each other, but as the story progresses, they start to understand and respect one another more. The plot is well - paced, and the author does a great job of writing their dialogue in a way that feels natural to their characters.
One great Stargate Sam and Jack fanfiction is 'Threads' which delves deep into their relationship. It shows how their connection grows over time and the challenges they face. The author does an excellent job of staying true to the characters' personalities.
One common theme is the challenges they face as a couple with a pregnancy. It could be about how they deal with the military regulations in the Stargate universe while expecting a child.
Some notable Sam and Jack fanfictions include 'Parallel Paths'. In this story, they seem to be on different paths in their careers but keep getting drawn back to each other. It's a great exploration of their connection. 'Facing Fears' is another. Here, they face their individual fears together, which brings them closer. There's also 'Heartfelt Moments' which is a collection of small but very poignant moments between them that really capture the essence of their relationship.
The theme of self - discovery is also quite prevalent. As they go through various adventures, Sam and Jack learn more about themselves, their powers, and their place in the world. And family is another important theme. Even though they may not be related by blood, they become like family in many of these stories.
For this fanfiction, the Vegas wedding could be a turning point in their relationship. Before Vegas, Sam and Jack were always tiptoeing around their feelings. But in Vegas, the rules seem different. The bright lights and non - stop action of the city give them the courage to take the plunge. After the wedding, they return to the SGC with a new - found confidence in their relationship. They face some initial resistance from their superiors, but their love is strong enough to overcome any obstacles.
One possible fanfiction could be that Sam and Jack decide to elope to Vegas on a whim. Maybe they've been secretly in love for a long time but couldn't act on it because of military regulations. In Vegas, they find a small chapel and get married in a simple yet heartfelt ceremony. Their friends back at the SGC are shocked but also happy for them when they find out.