I can identify with Mentalradio in his concers in having his child introduced to new people in XW life and even in his.
I've been through this with my own children. However I do feel their ages have everything to do with how they handle it.
His Daughter is very young, and may not quite grasp everything that's going on. I learned this in a mandatory divorce class. It was the best class and I think it should be mandatory that this class be taken before you file for divorce. It sure makes you stop and think of it from the child's perspective.
What I learned is that younger children tend to adapt more easily. Getting towards adolescence and teenager years...that's the rough part. I've got one pissed off pre teen that hates the OW and one 9 year old that doesn't care either way as long as she sees her dad.
I agree with Mr Bond, it's time to talk about it and set boundaries. When you see how your behavior effects your kids, its a no brainer to figure out what to do that's right for the kids. Listen to your kids, they will let you know what they need.
