"It must have been taken between 1904 (when she married and moved to Edgard) and 1918 when she moved back to Houma. "
Recently, there were two churches in Louisiana to have been destroyed by fire. A post from the LALGS indicated that the records of the Immaculate Conception Church may have been saved. The church is the oldest one in St. Landry Parish. The Diocese of Lafayette built it in 1836 however, it was established in 1756. The church records may have been saved from the fire by being stored in the rectory.
Here is link to an exterior shot of the Immaculate Conception Catholic Church taken in 2006. And here is one of the interior. If you open the exterior shot in a new window you can compare the photos.
Newslink - Rising from the ashes