Uh well they are YOUR kids too the last time I checked. I've seen instances where you can get it legally written out where no one new is to be introduced to the children after a period of time.
You can't control her, true. But you can prevent the children from being involved. Get to a counselor and get their opinion. Have your W attend too because this is about the kids, not the both of you.
Let's put it this way. Is this how you want your kids believing this is the way a M should go? Do you want them to get the impression that Dad thinks it's okay for another man to take their mommy away right in front of them?
Without a counselor seeing the interactions of my W and OM in front of the kids, I don't think it would make much difference. I'm sure my W would contest that nothing inappropriate occurs when she and OM are together with my kids present. And that is probably the case; I just don't want my kids around him and the swirling evil that is their relationship.
I say nothing to my kids about the OM. When they are old enough to understand, they will know everything about what Mom did.
OM isn't taking my W away. She has made the decision to be with him. Otherwise the OM would be a crumpled pile of goo right now...
WAW Using God Me-43 W-40 M-14 S-11 S-9 D-7 EABomb 5/09 Separated 12/09