yes you can have children legally here as long as you and your wife are legally married and have a marriage certificate. Because when your wife go to hospital for check up and when she will deliver the baby in the hospital, the hospital will ask you to submit the marriage certificate. when you will register to have a Birth Certificate at the Supreme Council for Health they will again ask for the marriage certificate and when you will apply for your baby visa, they will not require for a NOC, just the baby passport, you and your wife passport and RP ID.