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.
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.
One way is to search on popular fanfiction websites. Websites like Archive of Our Own (AO3) have a large collection of Rizzoli and Isles fanfiction. You can use the search function on these sites and filter by tags such as 'Rizzoli and Isles', 'Friendship', or 'Mystery' to find the stories that interest you.
You could base it on an existing storyline from the show. Say there's a case where Maura makes a decision that has negative consequences for Jane. Develop the characters' feelings from there. Have Jane feel betrayed, and Maura be remorseful. Then, as you write, let their relationship evolve. You can add in some side characters' reactions to spice things up.
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.
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.
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.
There's also 'Love in the Shadows'. This fanfiction delves deeper into their relationship, exploring how their professional lives interact with their growing love. It has some really interesting plot twists that keep you hooked. For example, there's a case that forces them to confront their feelings more directly than they ever have before.
One great piece of Rizzoli and Isles crossover fanfiction is 'A New Case'. It has an interesting plot where the characters from both universes team up in a really unexpected way. The author does a wonderful job of keeping the personalities of the characters true to the original shows.