No Stranger to Dicks

I am no stranger to dicks, most women are not. No, I 'm not refering to the body part...lol...talking about men. I found out that my son's father was still fucking around with other women again after all he has already been through. Needless to say he is either the stupidest man on Earth or the most selfish. I wasn't mad at him after all he's not my husband or my man, I was more worried due to what he has already done to himself with getting multiple women pregnant and dealing with his wife. I try to help him by trying to make him realize that the self sabotage and the drama will never end unless he stops treatin women like sex toys. After a day of what I would take as him letting it soak in, he starts treating me like the one who out to get him. I honestly believe he is in serious need of some help. The world is his oyster and he is ready to fuck them all...lol. After all his drama and pleas and swearing that he has changed, he hasn't. The worst part is the kids. I have decided I don't want my kid around it to adapt the immorality of his ways. I don't ever want my kids to think it is okay to treat women as such. It is dawgs like him that are continuing the circle of shelfishness in the world of partnering.
I don't care other that the fact he is my son's father and because of the way he is it taints us being civil for our son's sake. If I refuse to give into him, it is all my fault and I am the childish one. If I tell him that it is not right to have a wife and established home and still screw other women in private, I am the one trying to ruin his life. I care about him yes, he is my son's dad and I am trying to help him not make the same mistakes over but he wants it all. He want to live his life the way it will sabotage any hope of happiness in his life without the drama. He is selfish, egotistical and a womanizing whore. Do I have the right to keep my son away and teach him how to be a "good" man like a mom is suppose to or should I take the chance of him repeating a circle of this type of life. It is my job to protect my kid and teach him morals to excel in life in all ways or allow this man to taint his mind and take a chance of my son being a womanizer?