If my father told his 21 year old niece who she can and can't date, she would burst out laughing.
Obviously, most of us are closer to our nieces and nephews than you are. If my niece was dating someone no good and might have been abusive to her, I wouldn't hesitate for a second to tell her what she needs to do. I've already done that to one of my nephews over a girl he was hung up on. Just because you don't do it doesn't mean the rest of us do it.
