Pre-adultery, when we're still thinking of infidelity in the theoretical sense, most of us consider it a "deal-breaker". Yet, in the cold light of day following the discovery, the situation doesn't always seem so black and white. Karen was willing to give her husband a chance...until he kept saying he "couldn't make up his mind" between the two women and Karen decided her dignity was worth more than her wishy-washy husband. Ericka, a successful lawyer, had the resources to leave, but knew that she wanted to at least try and salvage her marriage. Others – like me, for example – spend months vascillating between the two choices.
What some of us can forgive or at least work at forgiving, others can't. Elizabeth Edwards reportedly believes that serial cheating is worse than a long-term affair.
The thing about betrayal is that, suddenly everything we think we know, we don't.