This is the situation:

My ex and I have been divorced for 5 years now. We have a 9 year old and a 15 year old. Both girls. We have joint custody and I have court ordered visitation with my daughters Tues and Thursday evenings and every other weekend. I started over following the divorce. My fiance and I have a 2 year old son in common. She has been involved since day one. As of August 2007, my ex has a court order stating that during my visitation with my girls, my fiance is to not be present. My oldest has been so manipulated by my ex to the point where she agrees with this, eventhough she has already established a bond with my fiance. My youngest is in complete disagreement with this arrangement. Now, as of a month ago, she has since tried to modify the order to request supervised visitation. As of right now, the judge has not signed it. Funny thing is, I have been abiding by supervised visitation and have had my brother present during pickup and drop off just to get them. Days and nights of visitation every other weekend have been at his house.
I am planning on picking up my kids this weekend without him. I know there is no signed order and she has been playing me for a fool because her own attorney has told me it was never signed by a judge.
Is this even a case for supervised visitation. My fiance has never even sworn at the children nor has she laid a hand on them. However, my ex claims she is entitled to simply because she is their mother. What do I do? She has done everything in her power to tear my family apart ever since my son has been born.