“move in with NPC" “move out with NPC"
These features doesn't work. They're broken. I've tested with npcs with both 100 trust and 100 dominance.
It does work; it's just not made very obvious what the mechanics of that are. It literally just means you default to staying in their place after sex if that's where you already were and you don't end it early.
At 100 Trust, really the only thing this accomplishes is that you are able to stay there while both gagged and restrained. Otherwise, you wouldn't be able to remove the gag to ask to stay.