I replied to your Guillory query re: Elodie Jean Baptiste Guillory and later saw this query.
Marie A. Fuselier, b. May 18, 1861, bt. St. Landry Catholic Church, SWLR V. 7, p. 186. She was the daughter of Alexandre Fuselier & Elodie Jean Baptiste Guillory.
Marie A. Fuselier m. Joseph Aucoin February 03, 1881 in St. Landry Parish Court House, SWLR V. 15, p. 21.
I have one Joseph Aucoin in my database who may be the one you are looking for, although I don't have him married to anyone.
Joseph Aucoin, b. 16 March 1848, bt. St. Landry Catholic Church, SWLR V. 4, p. 327.
Joseph was the son of Onezime P. Aucoin and Felicite Zenon Deshotels. Onezime and Felicite m. January 22, 1842 in St. Landry Catholic Church, SWLR V. 4, p. 140.
There were two other individuals named Joseph Aucoin, unmarried in my database, both born in 1865, and both baptized at St. Andrew - records stored in Sacred Heart Church, Morgan City, LA. I did not feel either one of these was a candidate to marry Marie, but I thought I would mention them as well.