Here are the quests I was able to datamine to find out that the AFT Spouse comments/interjects to:

Nuka Cola Sheffield (recently added - 7.03.23)
Green Jewel of the Commonwealth (intro with mayor)
Out in Left Field (intro with Moe)
In Sheep's Clothing
Painting the Town
Confidence Man

Fire Support
Call to Arms
Shadow of Steel
Show No Mercy
Blind Betrayal
Spoils of War

Magnolia Greet Quest
Vault-Tech Rep Ghoul Quest

Synth Retention
Building a Better Crop

The Silver Shroud

Sanctuary
Taking Independence

The Disappearing Act
The Secret of Cabot House
Diamond City Blues
Last Voyage of the U.S.S. Constitution
Human Error

Grey Garden Intro
The Slog Intro
Warwick Farm Intro
Charles View Ampitheatre Cult Join

Road to Freedom
Tradecraft
Boston After Dark
Precipice of War
Rockets' Red Glare