I have gotten custody of my son since he was one he is now 3.i got him through a dyfs case she had for child abuse the judge now is allowing the mother over night visits,I have found out his mother is basically a porn star and is heavylly involved in porn,at times she doesn't even pick my son up from school at her schedule visitation days,we meet at the police station for pick up and drop off,the judge gave us a 10 grace time in case we are running late,but she would leave exactly at the time,she puts on a act to judge as if she wants to see him but actually she doesn't,how can I present this to the judge about her involvement in the porn ENTERTAIMENT business and is it anything I can do or the judge can do to either stop visitation ,stop overnight visits,I feel my son health is in trouble causse of her sexual acts on porn,and well being cause when she do get him ,she drops him off at a friend house to do her porn.please help me and are there anything I didn't mention about the safety and well being of my son,that can help me keep my son away from that type of exposure?

Is the porn being filmed? Getting your hands on it and presenting to judge would be the fastest most effective way.
While your son may not understand the reality of what is happening he is still affected by the energy of being forgotten and left so watch out for signs of it. Be prepared to support him in healthy ways that uplift and encourage him as a child and person.
One of the most important things is to NEVER bad mouth the mother to him no matter how much you want to. Love him but don't overindulge him. Find ways to build his confidence and feelings of being loved. There are many resources online if you google "helping my child feel supported through divorce"