Wow! You two are angels for taking in those kids! It angers me that it was necessary, though. So sad.
Having said that, what you describe is pretty par for the course when dealing with PDs. I would read as much as possible on NPD, but realize that there will always be drama. See, people are no more than objects to NPDs- a means to an end. So, there will probably be a lot of push-pull centered around the kids. Just prepare yourself by learning as much as you can about it and how to protect yourself.
The kids are young. Hopefully, they're young enough to forget their lives, to date, and become able to bond with your family. I'm guessing they've never really had boundaries and will really work to try to figure out where they are.
(((wal & ws)))
I had a similar situation a few years back. My step-brother is, uh, troubled and after a long string of him putting his D into extreme danger (high-speed police chases, violence, etc.), custody was granted to my dad. We wanted to give her a forever home. She had her own room at our house in addition to my dad's place- with her stuff in it. CPS said he'd never re-gain custody.
He did. He got a job and kept it a couple of months, went in front of the judge and claimed that he was reformed, and the judge returned her to him. He promptly stole thousands from our parents, took her out of state, and we'll probably not see her again until she's old enough to make that decision on her own. I worry about her constantly- especially living with a violent psychopath like him. *sigh*
[This message edited by ThoughtIKnewYa at 8:41 PM, November 3rd (Sunday)]