If you thought Carrie cheating on Aidan with Big was bad, then...you should probably just rewatch Sex and the City Season 3. A full-blown cheating scandal like Carrie had in 2000 would actually send these women into cardiac arrest.
An affair can feel a lot more emotionally involved and deliberate than a one-night stand, as you now are left with trying to figure out when they saw each other.
"I saw the minimum payment in our shared bank account had changed, and when I asked, Clive was very sheepish. When he explained, I was firing so many questions at him - had he met them? Had they had sex?"