A brother and sister in Effingham County, Georgia, are behind bars after allegedly having sex in a tractor trailer parked in a church parking lot.

Police say Christopher Buckner, 20, and her brother, Tim Savoy, 25, admitted to committing incest three times after watching the Ryan Gosling romance "The Notebook."

Officers got wind of the family affair early Tuesday morning when they were responding to a call about a prowler in the area, WJCL.com reports.

Deputies searching for the alleged prowler saw Buckner and Savoy walking down the road. The cops somehow came to believe the siblings had an improper relationship.

The Effingham County didn't return HuffPost's call, but an official with the department told Bluffton Today that deputies determined that the pair were brother and sister and that they had just had sex in a Kenworth tractor trailer parked at Countryside Baptist Church.