Blessed is a 2004 British-Romanian horror film directed by Simon Fellows and starring Heather Graham and James Purefoy.
Their hopes are dashed when Samantha is diagnosed as infertile and the couple can't afford the medical treatments that might allow her to conceive.
The book publisher and the scientists at the clinic are connected to "The New Light of Dawn" church, a secret devil-worshiping cult.
Gasoline spills on the priest as he tells the doctor "He who walks with Satan shall burn in Hell" and then sets himself on fire with a lighter.
One of the guest children (who has disguised himself as the Devil) teases one of the girls and soon, he chokes on a grape and dies, his skin rotting and hardening.
[1] During filming, David Hemmings suffered a heart attack and was pronounced dead on the scene, according to his agent Liz Nelson: "he had just finished his final shots of the day and was going back to his dressing room".
"[3] Cinema Crazed described Blessed as "a horribly written, terribly directed, muddled piece of tripe that takes every advantage to mimic "Rosemary's Baby" and fails big time".