Fairfax County police said a man killed his daughter and wife and critically injured his son-in-law before an officer shot him.

Add Yahoo as a preferred source to see more of our stories on Google. They say there's no guarantee in life other than death and taxes. But if I were to add a third inevitability, it would be in-laws ...

You might even be able to spot these future tensions before the relationship gets fraught.

If your in-laws display any of these qualities often, they may be signs you have good reason for feeling off about them.

Christin Perry is a freelance writer with a passion for all topics related to health and family. She has been working as a writer for seven years now, and her work has appeared in Parents, The Bump, ...