For the purposes of the Immigration Act, a child lawfully born into a lawful marriage is (conclusively) presumed to be the child of both parents. Parallel holding under state law as alternative ground.
http://www.ca2.uscourts.gov/decisions/isysquery/c47e857f-f701-4ef9-a7f8-4e6809e4f3e8/1/doc/17-1512_opn.pdf#xml=http://www.ca2.uscourts.gov/decisions/isysquery/c47e857f-f701-4ef9-a7f8-4e6809e4f3e8/1/hilite/
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.