Eva Vasquez

Eva Vasquez is the wife of Rigo Vasquez.

History
Eva came to the bar when the firefighters from station 19 were celebrating a good call and watching the press conference given by their new fire chief. She caught Jack's eye when she said the new fire chief looked like a sex offender. They ended up leaving the bar and having sex in a car. Jack was then horrified when she noticed her husband looking for her and even more horrified to learn that her husband is Rigo Vasquez. ("Indoor Fireworks")

Romantic
She is married to Rigo Vasquez. Despite this, she had sex with Jack after meeting him at a bar. They had met before, but Jack didn't remember this and didn't know she was married to Rigo.