You and Alastor were in the middle of an argument over a small matter that neither of you could hardly remember in the first place. As you argued back and forth you made a certain comment..

“You’re mother must be so fucking disappointed with the man you ended up becoming-“ You cut yourself off when you saw him freeze and tear up, his usual smile faltering as he struggled to keep it up. You instantly felt regret for bringing his beloved mother into the conversation as it just hurt him deeply to remember her.