This is merely for my own education, has not happened to me(it's possible that's happened before but not to my knowledge).  
If you were cheated on, what/how did you find out?  Did you suspect?  What are the clues, etc.

I'm an open relationship type of person!so dont know.I don't like to strap guys down.let's be happy and fuck whoever right?why give yourself a headache over clues of what's cheating

-- Modified on 8/1/2016 9:46:26 AM

Turns phone over when together.  
Suddenly doesn't answer phone like before.
Unexplained inability to contact.
Irritable or hypercritical of you.
Feels distant.
Sloppy seconds feeling if they have doubled up.
Freshly bathed or clean for no reason.
Sudden change in mood from being 'normal' to being hyper happy or distracted.  
STDs

Unfortunately when women cheat they tend to be more vindictive about it than when men cheat.  Men cheat for pleasure, women cheat for love or revenge.  If I were advising a woman about her man cheating, I would tell her don't dig into it.  She'll end up throwing away her marriage and costing them both fortunes and a broken home.  But if she didn't dig into it and make a stink about it, probably they would continue a normal happy marriage.  (Assuming he isn't cheating because she is a cold fish or already vindictive.)

He'll hath no fury like a woman scorned