One of the many pairings in the Big Surprises Come In Weird Packages universe.
Summary:
Brittany on her way to Jessica's mother's funeral got amnesia. And can't remember almost anything about her life except for basic details and little bits here and there. Finding out that his girlfriend has no memory Gibbs goes back to work. Until he's forced to come back when he gets a very angry call from his, daughter/step-daughter, Jessica. After having a long conversation with the angry woman Gibbs finds out that Brittany remembers that they were dating and can't remember anything else in that area. And is very distraught to say the least. When she finally regains all her memories Brittany realizes how much she really needs Jethro, unlike any other man she's been with, and refuses to be away from him.(This is post video now) After many discussions with many bosses Brittany gets transferred from the Las Vegas CSI team to NCIS.
Link for Big Things Come In Weird Packages:
nfiction.net/s/4076223/1/Big_surprises_come_in_weird_packages