The goal for the next release is to introduce Chosen who knew your Forsaken back when they were both civilians.  At first, this will be just childhood friends and siblings, but in later releases I'd like to include more kinds of relationship (both familial and non-familial).  For players who want to avoid incest, there'll be a content toggle which causes the game to treat all relationships as non-familial.  The connection between the subjects of these relationships is even deeper than that between former teammates.  The fetishistic appeal here is pretty straightforward, so I'll focus on describing the gameplay aspects.

When Chosen with a personal relationship to your Forsaken show up, it will provide some challenges, but also some strong opportunities.  It'll require extra Motivation to deploy your Forsaken when one of the enemy Chosen has a personal relationship with that Forsaken, but the Chosen will also take even more extra damage than they do against former teammates.  After you defeat the Chosen, she'll have a large positive opinion modifier with any other Forsaken she has a personal relationship with, and they'll have the usual training consent modifier based on how you're treating the ones they care about.  This can cut both ways: if you're having trouble controlling one of your Forsaken, then you might be happy to also take a Chosen she cares about as hostage for her good behavior.  But after converting that hostage, you won't be able to abuse or sacrifice her without making the Forsaken even less cooperative than she was before.

At this point, I've added the basic logic for the new relationship types, and I'm writing alternative dialogue for in-combat encounters between Chosen and Forsaken with a personal relationship.  There are a lot of different pieces of dialogue to write, so I expect this to be the bulk of the work for this update.