When Loid starts to truly care about Yor and Anya beyond just the mission. For example, he becomes concerned about their well - being in a way that goes deeper than what the spy mission requires. He is gradually developing real family - like feelings for them.
Well, Spy x Family fanfiction can be really interesting. Some fanfictions might explore different relationships between the characters in more depth. For example, they could focus on the bond between Anya and Loid in a new situation that wasn't shown in the original manga or anime. It's also fun to see how authors play with the spy and assassin themes in unique ways.
Spy x Family manga has wrapped up. It provided a conclusive and fulfilling storyline that wrapped up all the loose ends. Now you can binge-read the entire series without any interruptions.