Blind to trouble coming...

In her punchy little book Your Future 'Other Half' It matters whom you marry, Rebecca VanDoodewaard expresses her concern for single people who often do not see trouble coming until it is too late:

This came home to me one day as my husband and I ate dinner with a youth group.  Three teens sat across from us at the table -- two guys and a girl.  One guy was a computer geek with glasses.  The other was a college student with slightly cooler hair and clothes.  The girl was obviously with him.  But while the computer geek was busy serving everyone at the meal, clearing plates and garbage, the college student got angry with the girl for a small accident and poured red juice over her leather jacket and white shirt in revenge.  She had picked the wrong guy, and the juice didn't seem to change her mind.  She is in for some grief if that relationship continues, especially if it leads to marriage; intimacy with a selfish, angry man will destroy much more than her clothes.  She is thinking in the short term without accounting for the long term.

This is painful to read.  It must have been painful to see.  
May God help us parents to keep the hearts of our children so that they heed our warning about trouble coming and run away.  If we are careless about their hearts, we too will not see trouble coming until it is too late.