Non biological step parent
My ex husband was added to my 2 1/2 year olds birth certificate after we married. The biological father was an uninterested party. Now divorced after a less than 5 year marriage, he has been emotionally abusive towards my child, rejecting him, leaving him at the door and only taking "his kids", telling my son whenever he asked for something to tell "mommy's boyfriend" to get it for you or telling me to tell Biological father to get it. He has been continually harassing me making false allegations, taking me to municipal court, interfiering with my job and my child care whom I pay in advance (he drops off out 2 other children to her after his overnight). He is now fighting me taking his names off the birth certificate and changing my son's name to my maiden name. I have changed my name as well. He is only doing this to harass me, and not at all interested in the welfare of my son. He has accused my son of sexually touching his younger sibling, and had him investigated, along with myself and my boyfriend. How do I get him out of our lives?