When you finally have everything you ever wanted, that’s when you have the most to lose.
Shock! Season 9 Fic!
This is set around 6 months after Existence, as Scully returns to work after maternity leave. Mulder hasn't had to take off so since being fired from the bureau he gets to be a stay at home dad. Mulder and Scully are married.
This is the only time I've ever approved of Scully taking Mulder's last name after their marriage, since she's doing so to stick it to Kersh, who will have to refer to her as "Agent Mulder". I love these little details authors come up with to torment characters...