In the context of the show, since Sapphire is in a relationship with Ruby, if we consider the concept of a 'father' in a non - traditional sense, Ruby could be seen as the co - parent. Gems don't reproduce in the same way as humans, but their relationship could be the equivalent of a parental unit in this fanfiction.
It's possible that in the fanfiction, the idea of a father figure might not be so straightforward. Given the nature of Gems, it could be that the new life is a result of some unique Gem magic or fusion. So, rather than a traditional father, it could be the combined essence of Sapphire and Ruby's love and connection that leads to the pregnancy, and they both would be the primary caregivers.
In a 'Steven Universe Sapphire Pregnant' fanfiction, perhaps the pregnancy is unexpected. Sapphire could start having premonitions about the future of their unborn child. The story might focus on how the other characters in the show react to the news. Some might be overjoyed, like Pearl who loves new life among the Gems, while others could be more cautious, thinking about the potential dangers in their world.
Well, in a 'Steven Universe Garnet Pregnant' fanfiction, the plot could start with Garnet sensing a new life within her. This could lead to a series of events where she has to protect this new life from the threats that the Crystal Gems usually face. Maybe she has to go on a journey to find a safe place for the baby. Along the way, her relationship with the other Gems, especially Ruby and Sapphire, could be explored in a new light as they also prepare for the new addition to their family.
Love is a very common theme. Their relationship is often explored in-depth, from the early days of their meeting to their deep, abiding love as Garnet. Another theme is loyalty. They are always there for each other, and this loyalty is highlighted in many fanfictions. For example, in stories where they face challenges together, their loyalty to each other never wavers.
A possible plot could be that Lapis is pregnant, and it's a result of some sort of experiment gone wrong in the Gem world. She initially fears for the safety of the unborn and struggles with her own identity as a mother - to - be. As she progresses through the pregnancy, she forms unexpected bonds with other characters who also have their own stories related to creation and family in the 'Steven Universe'. This could lead to a story of self - discovery, acceptance, and the power of friendship as they all face this new situation together.
Perhaps she's a time - traveler from a future where the events in Steven's world have led to some big changes. She could be on a mission to prevent a certain catastrophe from happening, and her presence in Steven's time is a crucial part of that plan. She might have knowledge of future events and technologies that seem strange to Steven and the others.
The plot could be that an old enemy from Rub and Sapphire's past resurfaces when they have Baby Steven. This enemy might want to use Steven for some evil purpose. So, Rub and Sapphire have to protect Steven at all costs. They use their unique abilities and their love for each other and Steven to fight off the enemy.
Another possibility is Hephaestus. Since he was Aphrodite's husband in the original mythology. In the fanfiction, their relationship could have taken an unexpected turn leading to the pregnancy. This could also add a layer of drama as Hephaestus might be overjoyed while Aphrodite could have mixed feelings due to her complex nature.
A 'Steven Universe Amethyst Pregnant' fanfic could be a story that delves into the origin of the pregnancy. Is it some sort of magical or scientific anomaly? How does Amethyst feel about becoming a mother? She has always been the more carefree and fun - loving gem among the Crystal Gems. This new situation could force her to grow up in a way. It could also touch on the theme of family and what it means to create a new life within the context of the unique world of 'Steven Universe', exploring how the different species and cultures in the show interact with this unexpected event.
One popular Ruby x Sapphire fanfiction is 'A Tale of Two Gems'. It beautifully explores their relationship with lots of sweet and tender moments. Another great one could be 'Ruby and Sapphire: Bonded Hearts' which delves deeper into how they support each other in different situations. And there's also 'The Ruby - Sapphire Union' that shows their journey together in a really creative way.
One possible plot could be that they discover they're pregnant unexpectedly. They then have to deal with the reactions of their friends and family. For example, Garnet might see it as a new beginning full of love. Pearl could be initially worried about how they'll manage but then become supportive. Amethyst would probably be excited and joking around, making the situation less tense.