lonelyolive, I have talked to OW's H and he said the one thing that was hardest for him to grasp (during the whole affair) was that MY husband helped HIS daughter get over her fear of the swimming pool slide. She told her dad (OW's H) that "I was afraid, but then Mr. ____ caught me every single time!". Can you imagine hearing that kind of stuff as a dad.
As a mom, when OW was around my kids, it was sickening. She would watch one of them while H would take the other to the bathroom, etc. Just gross. She is a good mom (just bad morals marriage-wise I suppose), so it could be worse. OW's H and I both laid down the rule that they will NOT be around the kids any longer. Its just not right.
I agree, a form of child abuse, even if the kids have no clue what's going on.