I would not hold your breath on that. If they are his children only, there would be no legal claim to them. That being said, is he a person who cares enough about his kids to allow visitation with you or your kids b/c it is the right thing to do? That is what I would try for if at all possible.
Maybe I am wrong here but I believe the only way that can be put into the order is voluntarily.
Originally Posted by
inpieces314 
If there is a divorce eventually, it can be put in the order for shared custody of all kids. If that is the only reason why you stay, it can be worked around.