In these fics Mulder and Scully have a living child or children -biological or adopted- who are older than their son William. (and they have William too.)

2012 - The Return by lsgrimm91 sister
After Mandy: Bobby by Pattie  sister brother
Alison by Pattiesister
All I Want For Christmas by Pattie
A Baby Changes Everything piper maru duchovny sister
Beyond The Truth by Neoxphile sister
A Birthday at Christmas by Duane Barry sister
Candy Apples by MSDR89 sister
Daughter by Ducky's Dream sister
Daycare by Devinsister
Everlasting by Cathey Scullysister
The Family G-Man by Neoxphile and FelineFemme sister brother
The Family G-Man: One Fine Summer by FelineFemme and Neoxphile sister brother
The Family G-Man: Confessions and Connections by Neoxphile and FelineFemme sister brother
The Family G-Man: IWTB by Neoxphile and Felinefemme sister brother
The Family G-Man: From Here to Paternity by Neoxphile and Felinefemme sister brother
Family Matters by Devin sister
Goodwill Towards Men by Neoxphilebrother
Gum and Note Passing by Devin sister
Home For the Holidays by Neoxphile sister
I Love My Mighty Machine by Pattie
I Should Have Known by ElleThom sister
Iunctio ut Redimio - Book 1 by Kay sister
Mandy by Pattie sister
The Marriage series by Angela W. (note: when prompted the password is "avalanche") sister
The Miracle Before Christmas by Teliko. x3 sister
Misbegotten Sons by Neoxphile brother
New Year's Revelations by Pattie sister
Our Miracle Boy is Ten by Pattiesister

Revenge by xxellie02xxsister
the Resurrection series by Neoxphile (kind of) sister
Santa Left Me Under the Tree. Really! by Pattie

A Sleepy Little Town series: Free Fall by Neoxphile sister
Sweet Sixteen by Devinsister
Tell 'em William Called by Pattie sister
The Truth Is Out There by xxellie02xx sister
Visitor in the Desert by Gillian Leigh sister
We Gotta Get Outta This Place by Pattie sister
When She Came Back To Me (aka 96 hours) by Lizzy sister
Who Knew? by ElleThom sister
William's Fifth Birthday by Erin Blair sister

Didn't find exactly what you're looking for? We could always use more new additions. Consider penning a fic for one of our related challenges :)

The Nursery Files