Half-sister

Jake Peralta, Most of the time he'll tell almost everything to his coworkers, he sees them as a family. A family he never really got and a great one at that. One thing he never did tell them though was that he had a sister, a half sister or that she was in the army or that she just got out due to an injury or that she pulled some strings so she could work with her brother not until she shows up a day before she starts work to see him and then everyone is surprised.

(PS Gina already knew)

*~Rosa Diaz X Fem Reader~*

Also I do not own b99 all the characters belong to the creator but I do own a bit of the story line and y/n so yeah