Excellent point here. Even if you get a few snapshots sent your way...don't take them at face-value (so to speak). Everyone has done a great job with their advice so I won't reiterate what's already been said...except to try to drive the point home:
Don't give out any more personal info than you already have (and that includes sending more pics of yourself)
Don't agree to meet in r/l (and I'm talking your mistress or someone else she sent your way) anytime soon...
Give us an update when you can...this is concerning to me.