I can certainly understand this is a frustrating situation for you. I'm a little confused... not sure how he can take you to court for visitation if he has relinquished his parental rights. Do you mean the court terminated his parental rights (or approved the relinquishment)...or do you mean he gave up a right to custody? Does he pay any child support?
I do suggest you contact an attorney to determine your legal options regarding the termination of parental rights and concurrent step-parent adoption. It is sometimes granted by the courts, particularly if the biological parent consents to the relinquishment/adoption - but from your post it doesn't sound like your ex would consent?
You can also browse through the information in LawInfo’s Free Legal Resource Center here:
http://www.lawinfo.com/index.cfm/fus...lient.consumer, or search for your particular topic here:
http://resources.lawinfo.com/index.html.
See also:
Family Law Resources:
http://resources.lawinfo.com/en/Lega...Law/index.html and
http://www.lawinfo.com/index.cfm/fus.../categoryid/17
Termination of Parental Rights:
http://resources.lawinfo.com/Search....arental+rights
Relinquishment and Adoption:
http://resources.lawinfo.com/Search....ourceType:FAQs