Ira Glass

And she stayed with him, despite that.

For a while, anyway.

And if you read the comments about it online, about them...

Lots were just vicious, calling her crazy, calling her delusional, calling her an idiot to stay with her husband.

It was very Lindy West, if you know what I'm talking about.

But a few women wrote in to say it all seemed more complicated to them.

One posted this, I am in this situation right now.

It's a difficult call to make.

My mom was a psychologist, and she specialized in couples where somebody had cheated.

She treated hundreds of these couples, and she did studies looking at hundreds more.

She wrote a book about her findings.

There's solid research.

A variety of researchers have shown that in one out of two couples, one or both partners will cheat during the lifetime of a relationship.

That's 50% of all relationships.

Most affairs are never detected.

And one of the surprising things that my mom found out in her research was that tons of people will have affairs even though they're happy in their marriage.

You don't have to be unhappy to have an affair.

56% of the men and 34% of the women in one of my mom's studies said they cheated though their marriage was happy.

And she said lots of couples came in to see her where that was the situation.

Where not only the cheated-on partner but the cheater cheated.