Do i have legal rights to have my ex-husband not have my son around his new fling, (

[Jules Bee]

who is bad news)? Unfortunately I have to add a bit of detail, I will make it quick I hope. Before Luke and I were together, his first love was a girl we'll call M-,. They dated for 8 months. They were young. 17 to be exact. She had a child already with a deadbeat dad and she talked him into relenquishing his rights as a father. They broke up when he went to bring her flowers and breakfist when she was sick from school to find she had locked him out of her place because she was cheating on him. She broke his heart. Fast forward...Luke and i met at 24. We hit things off great and were very much in lover. We got married 4 years later. I have a condition where tumours grow in my back, unfortunately I got addicted to pain killers and went downhill fast. We stayed together, I found work again in a good field that paid well. I got pregnant, and after our son was born we chose that i would be a stay at home mom. He was frustrated that I couldnt take care of a newborn, keep the house clean and make him dinner nightly and i begged to work on our relationship as he showed no pasion. A year of being neglected and feeling loney I made a horrible mistake of cheating, a one time fling I regretted and told him about. We divorced, and got back together for 6 months where he consistantly calle me a loser, worthless, piece of shit, nag, and all I wanted was for him to spend time with me once in a while. I had finally had it I had a nervous breakdown and checked myself into the hospital. He put all my stuff in storage and took me to court stating that because I had a history of addiction, couldnt financially provide at the time, and he took care of me I shouldnt be allowed to be aorund my son without surpervision. I was taking opiates routinely but not addicted due to the tumours again he used everything against me. Now I lost primary residence but still have joint custody. I live with my dad and I am back to the field i once worked and am on my way to getting out on my own. I kicked myself with guilt that i hurt him with my dad ways. Now I find he is dating this old girlfriend M_, who throughout the years became a crackjead, cocaine addict, heroin dealer, lost custody through dcf of her child when her house was raided and she was shooting up around her kid, she went to jail, and rehab, and lives with her dad, and always has except for when she lived with her heroin dealing boyfriend, She has no car, no job. Everything Luke used against me in the divorce and custody of our son, she has done AND worse. I am mortified that he chose this and says it's cause she is easy going. Duh the relationship is new, of course u aren't abusing her. BUT, he tried to get my son away from me, and i lived in guilt when i know I am an excellent mom, and he will chose to have her in his life. If I go to court, do I have the right to ask she not be in my sons presence. Is this not completely out of line?