Would You Tell?

Sharon asked an interesting question on her podcast that has come up in conversation before, and I thought I would stir things up by asking you guys:

If you saw your friend's spouse with someone else in a shady situation (i.e. cheating), would you tell your friend?


Hubby and I have discussed this before, and a situation along these lines actually came up once, and here is how we both feel:  We would confront the cheating spouse and say, "I give you 24 hours to 'fess up to your spouse.  If you don't tell him/her by then, I will." 

How would YOU handle this?