Well, Bella might initially be a bit taken aback. She's a very private person, and seeing her life and feelings in New Moon being fictionalized in fanfiction could be a strange experience for her. The Cullens, on the other hand, being more used to the idea of their family being a subject of fascination, might approach it with a bit more curiosity. Alice, for example, might be intrigued to see if any of the fanfictions predict events in a way that's similar to her visions. Carlisle might be more reserved and perhaps a bit concerned about how accurately or inaccurately their family values are represented in the fanfiction.
They might be quite amused. Bella could find it interesting to see different takes on her relationship with Edward during that difficult time in New Moon. The Cullens, especially the more light - hearted ones like Emmett, might get a good laugh out of some of the wilder interpretations in the fanfiction.
Bella would probably have a mixed reaction. On one hand, she might feel flattered that people are so interested in her story that they write fanfiction. But on the other hand, she could also be worried about how her relationship with Edward and the Cullens is portrayed. The Cullens would also have diverse reactions. Jasper might be a bit uncomfortable as he's always been cautious about how the family is perceived. Rosalie might be dismissive at first, thinking it's just some silly human pastime. Edward, well, he might be possessive and not like the idea of others imagining Bella's life in different ways, especially if it doesn't align with his view of their relationship.
Chapter 725, "Illegitimate Children Can Also Inherit Property!", is the clearest early answer because it turns Jiang Mingchuan's situation into a concrete plot event.
Chapter 634, "All Villains", is the clearest early answer because it turns Yu Li's situation into a concrete plot event.
Chapter 552, "Branches, 20 Points Each, No More", is the clearest early answer because it turns Branches's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Cheng smelled the scent and crawled out of the shed, but before...
Chapter 392, "Connected to Shang Shaobai", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. Early on, Bai Lu's hopeful heart had sunk once again.. By the end, Why not give it one more try?.
Chapter 727, "Can't Keep Up with the Twists Anymore", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Jiang Li only posted one picture, but it shut up those haters.
Chapter 385, "We Are Just Friends", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Miss Su was somewhat surprised to learn that Jiang Li was going to...
Chapter 546, "Good Sister, Stop Hitting Me, I Was Wrong!", is the clearest early answer because it turns Sister Li's situation into a concrete plot event.
Chapter 810, "I'm Waiting for Death", is the clearest early answer because the violence around Waiting becomes final instead of hypothetical. A useful checkpoint is the way the scene starts with Jiang Buchen was about to go crazy from hunger.
Chapter 543, "Please Name Ten Things You Dislike About Su Yinwan", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. The chapter gives readers a real answer by opening on What did Jiang Li just say?