Hi everyone, I am the big brother to an 18 year old girl, and I found her sitting in the dark at the kitchen table with a knife after arguing with her girlfriend (as in a same-sex relationship, not just friends) on the phone. I took the knife off her and took her outside to have a chat. After an hour, I thought I had calmed her down enough, and we headed to our rooms. I resisted the urge to go to bed, and about 30 minutes ago (2 hours after the first time) I hear her door open, and assumed she was heading to the toilet. I didn't hear the toilet door, so I went to check on her. She had another knife pressed to her wrist in the kitchen. I don't know what to do, but I just hugged her for about 10 mins, and promised that if she tried to sleep I would call the girl tomorrow and sort things out. I don't think she'd go through with it, but she has very poor control over her emotions, and tends to have a strange view on reality, so it scares me that even though I don't think she would, there's some chance that she might. Her girlfriend lives in another country. She's been with her for four years over the internet and phone, and we recently saw her in person for two weeks (for the first time). Ever since I've known, my sister just yells and screams on the phone at this girl during arguments which have occurred at least three nights a week for the last two years. Funnily enough, not one argument while we were there, but after getting out of the plane on the first leg of our trip home, she's on the phone arguing, not 30 seconds after we left the plane. My sister is very under-socialised, had many problems in school with socialising and has no friends currently that I know of. She has no job, sits in her room all day and either calls this girl or sleeps. She does nothing else. She goes to work in my business for a few hours each weekend, but that's it. The little money she has, she spends on phone calls overseas, and that's her whole life. Besides having just hidden all the sharp implements in the house and using cable ties to wire the medicine cabinet shut, does anyone have any immediate advice? I've spent time listening and just being there, but that doesn't seem to help much (as far as I can see). How can a big brother help?