Mature flag assigned since this delves a little into the dark side of love...
Last session the party confronted their former member, Demetri. The party rogue, Samara, is still intensely loyal to him, going so far as to shoot at other party members who attacked him despite him attacking her twice, once quite directly (making her the one and only target of a fireball).
I've decided to backchange the script to make the being they fought a doppleganger. Having a mandate to destroy the party from Triel the creatue isn't giving up, and it's decided after consulting with Triel to try to infiltrate the party and use Samara's love for Demetri as leverage to attack them.
The real Demetri is still alive and imprisoned by Triel while the lord figures out what to do with his soft hearted disobedient apprentice. In an effort to show a little deity intervention he'll begin to haunt her dreams at night - this will be the strongest clue the party, or more specifically Samara will get that something is amiss.
I can't wait to see the look on the player's face when she figures out she was intimate with a doppleganger (the players are, if not initimate, very close to it the way they pet around - the characters are known to be *close* - though how close the game hasn't touched on. The moment of betrayal would most likely be when she is most vulnerable, and I don't think too many guesses are required to figure out when that is.
Any ideas on this plot arc from the peanut gallery?
I think it sounds lovely. :)
Though there are lots of good moments for the "revelation." It would probably try to subvert her to the point of attacking or killing one of her comrades before getting close to thinking about revealing itself. Heck, it might NEVER come up, unless the doppleganger is killed and reverts to its natural form.