Good character development. The fanfiction should show how their relationship has evolved to the point of the kiss. It can't be just out of the blue. For example, showing their daily interactions, how they support each other in cases, and how that gradually builds up the romantic tension.
The relationship development is crucial. The build - up to their 'first time' should be gradual and believable. It could involve the characters overcoming obstacles, either in their personal lives or in their relationship with each other. Maybe they have to deal with a case that brings them closer together or some personal insecurities that they need to work through.
One possible plot could be that after a dangerous case, the tension between Rizzoli and Isles reaches a peak and they share a passionate kiss. It might be a moment of realization for both of them about their deeper feelings.
The plot is crucial. It could be a new mystery for them to solve that's just as engaging as the ones in the original series. Or it could be a story that delves deeper into their personal lives and relationships, like how they handle family issues while still being best friends and colleagues. A good fanfiction also has good writing, with proper grammar and a flowing narrative. If the writing is choppy or full of errors, it can be really off - putting.
The chemistry between Rizzoli and Isles in the original show is a big factor. Fanfiction allows fans to explore that chemistry further in a romantic context. It gives a chance to see their relationship develop in ways that the show might not have fully explored.
To write a good 'Rizzoli and Isles' OC fanfiction, start with a strong plot. It could be a new case that involves the OC in some way. Then, develop your OC's character gradually throughout the story. Let the readers get to know them bit by bit. For example, you could start with the OC's arrival at the precinct or the morgue. As the story progresses, show how the OC interacts with Rizzoli and Isles, and how they all grow together through the challenges of the case.
There could be a fanfiction where Maura Isles is pregnant and she and Jane have to deal with the challenges in their work environment while also preparing for the baby. Maybe they face some difficulties with their colleagues' reactions, but they support each other throughout.
The Rizzoli and Isles novels are typically numbered in the order of their publication. For example, the first novel starts the series off, followed by subsequent ones in the order they were released.
Yes, in many fanfictions they do get together. Fans often explore their relationship beyond the platonic one shown in the show and develop romantic storylines for them.
Fanfiction.net is also a great place to find Rizzoli and Isles fanfiction. It has a large collection of stories. However, the quality can vary. You might have to sift through a bit to find the really good ones. Look for stories with high ratings and lots of reviews. These are usually the better - quality fanfictions.
One great 'Rizzoli and Isles' OC fanfiction is 'The New Detective in Town'. It adds a really interesting character who shakes up the dynamic between Rizzoli and Isles in a fun way.