A/N

Jamie Severide is Kelly Severide's twin sister. Jamie, Kelly and Matt Casey all went to the academy together. Jamie moved away to Las Angles and had a girl called Alexandra but she gets called Alex. Alex is now 5 and they are moving back to Chicago. Matt and Kelly don't know that Jamie is coming back and she is going to surprise them. Jamie has always had feelings for Matt but never thought he felt the same but will he?