Karen, first of all, I'm only sending information and not trying to sort it out. My only interest in this family is that I have been helping Shirley Toney out. Many people have helped me find my family so I'm trying to pass the deed on. After reading your message I looked in the DBR( vol 9, pg 462) book which covers years 1858-1862 and found the following entry:
Francois Robic (Gustave Robic and Celonise David) bn. 25 April 1858 bt. omitted (May be intended) 1859 sponsor Henri Ernest Pascalin and Adeline Sicard (PCP-14,71)
This might be fact that you are basing your theory that they were married as late as 1858.