Thanks to all of you for the support. I am still stuck on contacting the OW's H...I do agree he has a right to know but I also know my H will flip.
For a day or two, yes -- maybe a week. But they get over it. Ask anyone else on here who has exposed; their bluster blows over quickly.
Is it magic? No. But it CAN be very effective. In my experience, it is a minority of men who will give up their marriage when the chit hits the fan. Most of them go running back to their wives, their tail between their legs.