Did your wife file any type of action to have your status as the youngest child's legal father terminated?
Did you look up the laws in New South Wales / Australia to see if she has the right to disestablish your parentage of the child?
I can't find the laws online . . . .
What are the laws in New South Wales / Australia concerning legal parentage? I assume that the husband is presumed to be the father of all children born during the marriage.
Under your law, is that presumption conclusive or rebuttable?
If the presumption is rebuttable, what are the procedures established by law for rebutting that presumption? Is there a statute of limitations?
I'm just so very CURIOUS because the laws in some of the states here require that an action to rebut the presumption of paternity that the husband is the father of all children born during the marriage must be brought within two years of the child's birth. Some states have longer statutes of limitations, e.g., five years.
Your laws could very well dictate the outcome concerning your parental status with respect to your youngest child.
And even if your wife is allowed to challenge your status as the father, there are other legal theories to prevent her from excluding you from this child's life . . . .
PLEASEEEEEEE, tell us what the laws are . . . can the laws be found online?
If you're unaware of the laws concerning these MATERIAL issues, you could be shooting yourself in the foot. CONSULT a lawyer!