Good question KT. There are so many unanswered questions and very little information available for the public. No cell phone information, no vehicle information. Seems like most info comes from comments of the family, which of course is hearsay. Speaking of hearsay, one of the comments referenced her celebrating Mardi Gras on February 12th.
"Her failure to attend court dates involving the custody of her children has raised suspicions among investigators about her disappearance, but Mouton said authorities now have
no indication that her disappearance is connected to any sort of crime."
http://www.theadvertiser.com/article/20130511/NEWS01/305110014/Family-friends-seeking-missing-Lafayette-woman-who-fleeing-husband?nclick_check=1
If there is no indication that she is not missing on her own accord, then the only other alternative is they believe she is missing on her own will.