My little sister is 37 years old, so there's not a thing I can do about this.
She has a history of dating HORRIBLE men. She's diagnosed Borderline with Narcissistic tendencies.
I was talking to my dad last night and he said that he had taken her to "Mental Health" the previous night because she felt like her meds weren't working. This behavior usually has something to do with a male, so I asked if there was anyone in her life...
Dad: "She's seeing someone. He lives next door to her."
Me: "Is he married?"
Dad: "No. Not married, no kids."
Me: "OK. Does he have a job?"
Dad: "Yes, he's had the same job for twelve years, owns his house outright, cars are all paid off."
Me: "OK. Well, so far, he seems totally different than the guys she usually chooses. What's the catch?"
Dad: "Welllllll, his last girlfriend is still missing."
Me: "OK. Did she go missing under suspicious circumstances?"
Dad: "Your sister says she was crazy and burned her house to the ground, but they didn't find a body in there, so she wasn't in there, but they HAVE questioned this guy pretty seriously."
She's going to get herself killed. And there's not a THING I can do about it. 
