<human>: Can you give me a shortened version of the text?

She has been fooling around online with this married man old enough to be her father for about 6 months. He has been a terrible influence on her. He ignores his family in real life to play around with her and several other girls our age. She knows he is married, how old he is, that he has children her age and that he does this with other young women but she still continues to see him.

I have told her time and time again that he is bad news, and she ended up breaking it off with him last month but now they're back together. Last week, I completely lost it and told her that she was making a mistake by being with someone so disgusting. I told her the truth, but I didn't handle it with hatred or immaturity, but she called me horrible things, told me that I was being judgmental. I haven't spoken to her in a week and she deleted me off of facebook.

I used to be involved with men online like that when I was in high school and it really messed me up emotionally.  It's one of my biggest regrets in life and I don't want her to make the same mistake.

She hasn't been the greatest friend for me to be honest, but I care for her. She constantly mooches off of me, brings drama and jealousy. Even in our fight last week, she brought up how I never gave her good enough gifts for her birthday, etc.

I'm not sure how to handle this. She has completely changed  because of this creep and it's all going on under her parent's roof. I'm the only other person that knows about it. Should I contact her mom and tell her what's going on? This man is using her. On the other hand, she is a legal adult and capable of making her own choices - even if they are bad. But as someone who personally went through the **exact** situation, I feel that it would be wrong for me to shut my mouth.
<bot>: my friend is cyber-screwing with a man more than twice her age that preys on young college girls and he is using her. help.