Maybe she has a deep emotional connection to it. It could be that she has spent a lot of time reading and getting immersed in the Bemsen fanfic world, so she feels possessive as if it's something very personal to her.
It could be that Amanda has put in some effort related to the Bemsen fanfic herself. Maybe she has contributed to discussions about it, or has created some fan art inspired by it. This investment of her time and energy makes her feel that she has a certain stake in it, and thus she becomes possessive. Another reason could be that the Bemsen fanfic represents something that she lacks in her real life, like a particular kind of relationship or adventure that the fanfic portrays, and so she clings to it possessively.
Chapter 831, "Brother, who do you like the most?", is the clearest early answer because it turns Sister's situation into a concrete plot event. The chapter turns that into something concrete by moving from Just as Jiang Shixu finished washing up and was getting ready to...
Chapter 779, "Unmarried but Have a Daughter?!", is the clearest early answer because it turns Xing Mingfei's situation into a concrete plot event. The chapter gives readers a real answer by opening on Right, there's one more important thing," Shen Lan looked at Chen...
Chapter 437, "A Gentleman's Revenge is Not Too Late Even After Ten Years!", is the clearest early answer because it turns Revenge's situation into a concrete plot event. It opens with [What's happening, why did a group of people suddenly show up and...
Chapter 842, "Uncle Zhao?!", is the clearest early answer because it turns Gu Qiang's situation into a concrete plot event.
Chapter 514, "Truly Deserved! Number One on the Individual Ranking!", is the clearest early answer because it turns Eldest Miss Jiang's situation into a concrete plot event. Early on, Another mentor was very satisfied with Jiang Shixu and his team's....
Chapter 605, "The Plan to Surround and Annihilate Team Q Commences!", is the clearest early answer because it turns Captain Ji's situation into a concrete plot event. It opens with The thirty-odd people lurking by the shore were just like today's...
Chapter 671, "Who Understands Family!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Director Meng drove the shuttle bus around Jingcheng Airport.
Chapter 569, "Watch How My Sister Torments You!", is the clearest early answer because it turns Chinese's situation into a concrete plot event.
Chapter 571, "Do You Know What Kind of Doctor is Standing in Front of You?", is the clearest early answer because the rescue effort creates visible on-page results. It opens with You, you actually know about astronomy?" Jiang Yan lifted his chin,...
Chapter 457, ""Back Against the Wall", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. It opens with Five minutes later, he stared at Yu Li with his twitching mouth... and closes on How could he know what this mad fortune-teller was up to?.