FAMILY LAW ACT 1975 - SECT 69P wrote:
Presumptions of parentage arising from marriage
(1) If a child is born to a woman while she is married, the child is presumed to be a child of the woman and her husband.
You said that your wife brought the new baby home from the hospital, she failed to mention that the child was not your biological child.
You accepted your youngest daughter into your home as your child.
When did you find out the child was not your biological child?
Has the biological father ever stepped forward to develop a relationship with the child and to support the child?
Has the biological father executed an acknowledgment of paternity or parentage?
If you are excluded from the child's life, is the biological father ready, willing, and able to step forward and be the child's father (with all rights and duties)? or will the child be left without a father?
Is there an interim order in effect concerning custody/visitation/support that the parties must follow while the divorce is pending?
Is there a court order that specifically prevents you from exercising visitation with the youngest child or is this something the wife has decided all on her own?
What have you and your wife told the children with respect to why you are allowed to visit the two oldest children but not the youngest child?
Are you fighting for full custody of your children or for reasonable visitation privileges?