I know that COW/OW is someone your kids know and like. However, I have two close female friends, "aunts" that my girls love to death. This is not even a remote possibility, but I'm quite sure that if my girls saw me being affectionate in a male/female way with them that they would be tremendously confused.
Try to talk your H down on this. I think he's deluding himself and probably hurting your kids.
BD
My latest
Me: 36 W: 35 2 D: 9 and 5 T: 16 years M: 12 10/4/06: Bomb 10/5/06: Ended A 4/22/07: ILYBNILWY