Child support and its not your child

Adulterine Bastard

Adulterine bastard, though not used in many places, is a term used to describe a child born to a married woman when the woman's husband is not the father of the child. This may occur if a woman becomes pregnant by someone other than her husband during the marriage; if a woman enters the marriage already pregnant (by someone other than her husband); or if a woman, without her husband's consent, becomes pregnant through artificial insemination by donor.

SIDE BAR--ADULTERINE BASTARD

Adulterine bastard, though not used in many places, is a term used to
describe a child born to a married woman when the woman's husband is not
the father of the child. This may occur if a woman becomes pregnant by
someone other than her husband during the marriage; if a woman enters
the marriage already pregnant (by someone other than her husband); or if
a woman, without her husband's consent, becomes pregnant through
artificial insemination by donor.

In the past, many divorcing husbands attempted to evade paying child
support in these situations, claiming that the children were adulterine
bastards and therefore not "theirs." Many states, however, have laws
which irrebuttably presume (that is, the presumption cannot be
disproved) that a child born during a marriage is the child of the
husband, regardless of who the biological father is.

I'm doing some legal research on child support and maintenance - specifically when one parent (father) finds out that the child he is supporting after the divorce is actually not his child - he is not the biological father. Belief that he was the father was a major factor in proeprty settlment where his wife received most of his property and was entitled to child support and other money. The father now wants to ask for reimbursement.