Well, if we assume it's related to some kind of character named 'Pebbles', themes could include the challenges of pregnancy, family and relationship dynamics. Maybe how the other characters in the story react to the news of Pebbles being pregnant.
I'm not sure specifically about 'pregnant pebbles fanfiction' as it's a rather niche topic. However, you can try looking on fanfiction websites like Archive of Our Own. Just search for 'pregnant pebbles' in their search bar and you might find some relevant stories.
I don't think it's a true story. Usually, such characters and tales are created in the realm of imagination to capture people's interest and maybe teach some lessons.
The Sand Pebbles is mainly a creation of the author's imagination. It might draw inspiration from real-life elements but is not a factual account of an actual occurrence.
The story of 'Sand Pebbles' is a mix. While it may have roots in reality, it incorporates fictional elements to make it more engaging and cinematic. So, it's not a straightforward true story.
Love Power Generation was a membership-based platform that connected creators and fans. Tian He Shi Zi was an author who loved electricity. His works included collections of robbery and plunder. I'm not too sure about the specific style and details of the Heavenly River Stone. If you are interested in the work of Tianhe Stone, you can search for his name on iPowerGeneration to learn more about it.