More information is needed. The issue is not whether your son is the husband's biological father, but rather whether the husband is the legal father. Depending on when the child was born relative to your marriage and when the child moved into the husband's home then the husband could be the legal father and have parental rights. Is there another legal father? You should consult with an attorney with experience in complex paternity matters.
Answered on Feb 28th, 2017 at 4:29 PM