Well, I disagree. I told my adult daughters the truth, and eventually my S-then-14 the truth as well, in an age-appropriate manner ("Mommy has a boyfriend, and married people shouldn't have boyfriends or girlfriends. I'm upset about that, and she won't stop, and that's why we've been fighting.")
It's ironic you bring up kids overhearing, because that's actually one of the reasons I'm so pro-exposure. People talk, and I was horrified my kids would eventually hear something at school or from a friend (my wife was hooking up in parking lots with her OM). I preferred that they hear it from me, in love.
