Hey. Was in an identical situation with H about a year ago. Very similar thing happened. H took son to a baseball game. It seemed innocent enough except H wanted son to get a haircut and he bought him a special outfit. Thought it was a bit much, but me being me, I indulged him. Anyway, son came home and told me he met daddy's "friend" and she had a seven year old as well. I confronted H because we too had the same rules about introducing new people and he said they ran into her. Yeah right. My H is a liar and I had those same expectations you had of your H. Why lie? We are no longer together so you can finally tell the truth after lying for so many months/years. Why not come clean and since this person was good enough for you to ruin your first family, maybe give her the respect of bringing her out the shadows. Anyway, you are expecting integrity and honesty from a man who can't give it at this point in his life. Personally, I think it is a pity any woman with a child herself who would come between a man his family. It is sad and desperate. I wouldn't dream of it. I wouldn't tell the kids though I get why you would want to. I grappled with it myself. I don't think they would understand and I think it is just a kids innocent nature to like the people their parents like until they get old enough to know better. Don't worry, if Stephanie is still around your kids will see it soon enough.