I've had frank conversations with quite a few couples.
Lumping infidelity in with other lies, work habits, spending.... is NOT applicable in my book. Sorry. People and marriages can become DEVISTATED by infidelity. I wasn't even married to the guy who cheated on me and I'm still suffering emotioanlly. This isn't just a matter similar to spending a couple hundred dollars without telling your partner.
I am also curious if you and Vashti have ever dealt with the topic first-hand.