How do I stop my head injured sister from meeting some guy she "met" on BeNaughty.com?

He’s been e-mailing and calling her so often that I am growing more and more concerned. He supposedly knows that she has deficits (bad short term memory, speech and motor problems). She lives with us because she is so easily taken advantage of.

It really bothers me that she met him on BeNaughty.com.

I feel caught between just letting her live her life and then trying my hardest to protect her. She has lots of friends that she doesn’t tend to go out with because she can’t remember to make plans and then follow through with them.

He raises my creep metre. I’m going to go with her when she meets him but I cannot be a constant chaperone. I’m just too busy with my own life.

This is a dilemma for me. How would you handle it?