She could be hurt in a building collapse. Maybe she's following up on a lead in an old, dilapidated building. All of a sudden, the building starts to crumble, and Erin gets trapped under the rubble. The rest of the Chicago PD team would then need to search through the debris to find her and get her to safety.
Another idea is that Erin is hurt during a hostage situation. She might be trying to negotiate with the hostage - taker when things go wrong. The hostage - taker could attack her, leaving her with some serious wounds. Her colleagues would then have to take over the negotiation and also ensure Erin gets medical help as soon as possible.
In a fanfiction, Erin could be hurt while trying to protect a witness. She might be ambushed by the bad guys who are after the witness she's guarding. This could lead to a tense situation where she's physically injured, and the rest of the team has to figure out how to both take care of her and keep the witness safe.
Perhaps Erin gets hurt in a shoot - out that erupts unexpectedly. She could be caught in the crossfire while trying to protect a civilian. Her injury might be serious, forcing her to take time off work and deal with the physical and emotional trauma. Her friends on the force would be there for her every step of the way, helping her through the difficult recovery process.
She could be hurt in a car accident while in pursuit of a criminal. The car could crash, leaving her with various injuries.
Well, perhaps in the fanfiction, the pregnancy is unexpected. Jay and Erin could struggle with telling their friends and family at first. There might be some drama at work too, with superiors being concerned about Erin's ability to do her job while pregnant. But they could also have some really sweet moments, like going to doctor's appointments together and getting excited about the baby's first kicks.
One idea is that Lindsay gets hurt by a booby - trap. She's exploring a crime scene and accidentally triggers a hidden trap. It injures her leg badly. She then has to rely on her colleagues to carry on the investigation while she recovers. This could also lead to some interesting character development as she has to deal with being incapacitated for a while.
Romance is also a very popular theme. Writers often develop the relationship between Erin and Jay, from the initial attraction to the deeper emotional connection. They might write about their first date, or how they deal with conflicts in their relationship while being in a dangerous line of work. It adds a lot of drama and emotional depth to the fanfictions.
One idea could be a joint emergency situation where a building fire is also a crime scene. Maybe the arsonist is still on the premises and the teams from both Chicago PD and Chicago Fire have to work together. The PD has to search for the suspect among the chaos and the firemen have to put out the fire while also trying not to destroy evidence.
In the fanfiction, they might kiss because of a sudden realization of love. Maybe they've been in denial about their feelings for each other, and then something happens, like one of them is in danger, that makes them face their true emotions. Also, it could be due to a shared emotional moment, such as when they open up to each other about their past traumas.
Jay and Erin are the central figures. Jay, a well - known character in the Chicago PD universe, and Erin, his partner in different aspects. With Erin's pregnancy, they become the focus of this fanfiction. Their reactions, emotions, and the changes in their relationship due to the pregnancy are what readers would be interested in.
Maybe there's a serial killer on the loose who targets victims in both Chicago and New York. The Chicago PD starts noticing a pattern of killings in their city, and SVU has been dealing with similar cases in New York. They come together to compare notes. The killer seems to be targeting young women who are involved in marginalized communities, whether it's through drugs in Chicago or prostitution in New York. The combined forces of both teams are needed to stop the killer before more lives are lost.