BOSTON — A Massachusetts couple say their faith cost them their foster license after they refused to sign the state’s gender-affirming policy — a rule they claim forced them to “go against God.”

Lydia and Heath Marvin of Woburn told WBZ they had spent years caring for foster children, including a medically fragile baby they raised for more than a year, when the Department of Children and Families suddenly pulled their license in April.

The reason, they say, was simple: they wouldn’t sign a new form requiring foster parents to affirm a child’s chosen gender identity and pronouns.

“We’ll love and support any child in our home,” Lydia told WBZ. “But we simply can’t agree to go against our Christian faith.”

The Marvins appealed the decision — and lost. They’re now part of a federal lawsuit backed by the Massachusetts Family Institute and Alliance Defending Freedom, which claims the policy forces parents to “say things they don’t believe” and punishes people of faith for their convictions.

Last week, the Trump administration’s child-welfare office blasted the Massachusetts policy in a letter to DCF, calling it “deeply troubling” and a “direct violation of First Amendment protections.”

State officials say the rules exist to protect LGBTQ children, who make up nearly a third of the state’s foster-care population. But the Marvins say they’ve been left heartbroken — and sidelined from the work they believe they were called to do.

“Our Christian faith drives us to care for the fatherless,” Heath told WBZ. “We would love and care for any child — but we can’t sign something that denies what we believe.”

DCF declined to comment on the ongoing case.