She was grayed out, but still felt a bit weird that you selected everyone and she didn't go.
Also, my bad, I started a new game to check and the teleport does work properly (I realized that using a completed game to check might not be the most accurate way to check). It just looks kind of weird that the cave entry shows up right away. Might be better to have them grayed out if there are no valid teleports and have the internal areas only show up if they are active, if possible. Otherwise, that list does tell the player some information that they might not normally have access to, like hidden areas. Unless that is your intention.