“Children Of Sin” (* out of four) was a sinfully dull horror thriller about two mischievous siblings (Lewis Hines and Meredith Mohler) who are sent to a temporary boarding house whose owner (Jo-Ann Robinson) turns out to be (what else? a religious nut whose not quite as nice as she appears and they have to struggle to survive and escape. Result is like a wilted remake of “Flowers In The Attic” but even that movie was stale material back in 1987. Robinson does what she can with a ridiculous role. Writer/director Christopher Wesley Moore has a small but key role as one of Hines’ lovers at the house.