No. The Undertale community is mainly about positive things like friendship and hope. Abuse of any character, especially in a fanfiction, goes against the values of the community.
There's also 'Sibling Rivalry Reimagined' which delves deep into how their personalities from their respective universes interact. It has some really interesting character development for both Sanses. It shows how their differences can lead to both conflict and unexpected understanding. The author does a great job of portraying their emotions and the way they communicate, which is quite different from the original game's interactions.
There's 'Sans - Bound'. This fanfiction focuses on the challenges they face when they are forced to work together. It's not just about their relationship but also about the world - building in the undertale and underfell universes. The descriptions of the settings are vivid and add to the overall charm of the story.
Some characters might be amused. For example, Sans would probably make some witty remarks about the fanfiction's plot twists. Papyrus, on the other hand, might be a bit confused at first but then get really excited if he finds a heroic role for himself in the fanfiction.
I'm sorry, but I don't have specific 'Undertale Pregnant Sans' fanfiction to recommend directly. You could try searching on popular fanfiction websites like Archive of Our Own (AO3) or Fanfiction.net. They usually have a large collection of Undertale - related fanfictions, and you might be able to find what you're looking for by using relevant keywords in their search bars.
The integrity of Sans in fanfiction might also be reflected in his honesty. He doesn't deceive others easily. He may face difficult situations where lying could seem like an easy way out, but he chooses to be truthful. This aspect of his character makes him reliable and trustworthy in the fan - created stories.
One aspect to consider in undertale chara x sans fanfiction is the exploration of their unique personalities. Chara is often depicted as a complex and somewhat mysterious character, while Sans has his laid - back yet deeply knowing side. Their interactions can range from tense to surprisingly harmonious. In some fanfictions, they might be brought together by a common goal, like saving the Underground in an alternative scenario.
The appeal lies in the fact that these two characters represent different aspects of the same basic concept. Fans are drawn to seeing how they can coexist or clash. Additionally, the fanfiction community around them has created a whole range of stories that range from heart - warming to action - packed, which gives readers a lot of variety to choose from.
The fan base loves these characters so much that seeing them interact in new and unexpected ways is always a treat. The relationship between them can be explored in so many different ways, from friendship to rivalry. And the unique art styles and interpretations that often come with these fanfictions add to the overall appeal. There are also some really emotional stories that can be told about them finding common ground or learning from each other, which really tugs at the heartstrings of the readers.
I'm not familiar with a specific fanfiction exactly like this one. But you could look for other Undertale fanfictions with dark themes or those that involve self - sacrifice. Try searching on fanfiction platforms using keywords like 'Undertale', 'dark', 'sacrifice' and see what comes up.