My stepson is 14.my husband has full custody and the son wants me to adopt him but his bbirthmother said no.they have nothing to do with each other.what age does he have to be to cut ties with his birth mother in tx?

My stepson is 14.my husband has full custody and the son wants me to adopt him but his bbirthmother said no.they have nothing to do with each other.what age does he have to be to cut ties with his birth mother in tx?

18...

Otherwise its going to be expensive and difficult to do this without her blessing.