Perhaps she physically hurts him in some way that is revealed gradually in the story. Maybe she has some sort of anger issue and in a fit of rage, she lashes out at him. However, without reading the specific fanfiction, it's hard to be certain.
There might be a negative impact on his work performance. If he is constantly dealing with the emotional turmoil caused by his mom, he could be distracted and make mistakes. Maybe he misses important clues during an investigation because he's preoccupied with his mom - related issues.
One possible fanfiction could be that Kensi and Deeks are on a dangerous undercover mission. In the heat of the moment, as they narrowly escape from the bad guys, they share a passionate kiss. It's a moment of relief and realization of their deep feelings for each other.
There are fanfictions that focus on their backstories. For example, a story might explore how Deeks coped with his past and how Kensi was there for him during a tough time. It shows their deep bond not just as partners but as friends who support each other.
Archive of Our Own (AO3) is also a great place. It has a well - organized tagging system, so you can easily search for Kensi and Deeks fanfiction. There are often some really creative and well - written stories there.
One possible scenario in this fanfiction could be that Callen gets hurt during an undercover mission. Maybe he's been discovered by the bad guys and they attack him, leaving him with a serious injury. His team then has to race against time to find him and get him medical help.
One great fanfiction could be 'Callen's Struggle'. In this story, Callen gets injured during a mission and has to deal with both the physical pain and the fear of not being able to return to his full strength. It really delves into his character and how his team supports him.
What if there's a time - travel element? Kensi and Deeks are sent back in time to a different era. In this new and strange environment, they rely on each other more than ever. And during a moment of celebration in that era, they share a kiss. It would be a unique take on their relationship and add a whole new layer of adventure to the fanfiction.
He could also get hurt because of his own recklessness. Callen is known for his bold actions. Sometimes, his eagerness to solve a case or catch a criminal might lead him to take risks that result in injury. For example, chasing a suspect without proper backup or entering a dangerous situation unprepared.
You can start by looking on fanfiction.net. It has a large collection of NCIS Los Angeles fanfictions, and you can easily search for ones related to Callen being hurt. Just use the search bar and type in relevant keywords like 'Callen hurt' and 'NCIS Los Angeles'.
One great 'ncis ncis los angeles crossover fanfiction' story is 'The Joint Mission'. It combines the characters from both shows in a really exciting way. The story has a great plot that keeps you on the edge of your seat as the teams from NCIS and NCIS Los Angeles work together to solve a complex international crime.